/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/divbin2_valuebound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-08 11:45:05,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-08 11:45:05,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-08 11:45:05,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-08 11:45:05,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-08 11:45:05,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-08 11:45:05,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-08 11:45:05,240 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 11:45:05,252 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-08 11:45:05,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-08 11:45:05,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-08 11:45:05,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-08 11:45:05,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-08 11:45:05,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-08 11:45:05,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-08 11:45:05,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-08 11:45:05,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-08 11:45:05,255 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-08 11:45:05,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-08 11:45:05,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-08 11:45:05,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-08 11:45:05,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-08 11:45:05,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-08 11:45:05,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-08 11:45:05,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-08 11:45:05,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-08 11:45:05,256 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-08 11:45:05,256 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-08 11:45:05,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-08 11:45:05,256 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-08 11:45:05,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-08 11:45:05,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-08 11:45:05,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-08 11:45:05,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-08 11:45:05,475 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-08 11:45:05,476 INFO L275 PluginConnector]: CDTParser initialized [2022-04-08 11:45:05,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound20.i [2022-04-08 11:45:05,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/413a73607/7ef0761e1c0a42aab53658b7a16c1d35/FLAG829efed83 [2022-04-08 11:45:05,928 INFO L306 CDTParser]: Found 1 translation units. [2022-04-08 11:45:05,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound20.i [2022-04-08 11:45:05,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/413a73607/7ef0761e1c0a42aab53658b7a16c1d35/FLAG829efed83 [2022-04-08 11:45:06,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/413a73607/7ef0761e1c0a42aab53658b7a16c1d35 [2022-04-08 11:45:06,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-08 11:45:06,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-08 11:45:06,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-08 11:45:06,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-08 11:45:06,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-08 11:45:06,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.04 11:45:06" (1/1) ... [2022-04-08 11:45:06,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@364d8ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 11:45:06, skipping insertion in model container [2022-04-08 11:45:06,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.04 11:45:06" (1/1) ... [2022-04-08 11:45:06,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-08 11:45:06,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-08 11:45:06,539 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/divbin2_valuebound20.i[951,964] [2022-04-08 11:45:06,553 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-08 11:45:06,561 INFO L203 MainTranslator]: Completed pre-run [2022-04-08 11:45:06,573 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/divbin2_valuebound20.i[951,964] [2022-04-08 11:45:06,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-08 11:45:06,590 INFO L208 MainTranslator]: Completed translation [2022-04-08 11:45:06,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 11:45:06 WrapperNode [2022-04-08 11:45:06,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-08 11:45:06,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-08 11:45:06,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-08 11:45:06,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-08 11:45:06,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 11:45:06" (1/1) ... [2022-04-08 11:45:06,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 11:45:06" (1/1) ... [2022-04-08 11:45:06,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 11:45:06" (1/1) ... [2022-04-08 11:45:06,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 11:45:06" (1/1) ... [2022-04-08 11:45:06,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 11:45:06" (1/1) ... [2022-04-08 11:45:06,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 11:45:06" (1/1) ... [2022-04-08 11:45:06,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 11:45:06" (1/1) ... [2022-04-08 11:45:06,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-08 11:45:06,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-08 11:45:06,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-08 11:45:06,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-08 11:45:06,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 11:45:06" (1/1) ... [2022-04-08 11:45:06,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-08 11:45:06,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 11:45:06,655 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 11:45:06,657 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 11:45:06,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-08 11:45:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-08 11:45:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-08 11:45:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-08 11:45:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-08 11:45:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-08 11:45:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-08 11:45:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-08 11:45:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-08 11:45:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-08 11:45:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-08 11:45:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-08 11:45:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-08 11:45:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-08 11:45:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-08 11:45:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-08 11:45:06,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-08 11:45:06,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-08 11:45:06,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-08 11:45:06,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-08 11:45:06,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-08 11:45:06,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-08 11:45:06,748 INFO L234 CfgBuilder]: Building ICFG [2022-04-08 11:45:06,750 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-08 11:45:06,875 INFO L275 CfgBuilder]: Performing block encoding [2022-04-08 11:45:06,882 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-08 11:45:06,882 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-08 11:45:06,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.04 11:45:06 BoogieIcfgContainer [2022-04-08 11:45:06,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-08 11:45:06,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-08 11:45:06,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-08 11:45:06,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-08 11:45:06,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.04 11:45:06" (1/3) ... [2022-04-08 11:45:06,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5924fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.04 11:45:06, skipping insertion in model container [2022-04-08 11:45:06,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 11:45:06" (2/3) ... [2022-04-08 11:45:06,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5924fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.04 11:45:06, skipping insertion in model container [2022-04-08 11:45:06,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.04 11:45:06" (3/3) ... [2022-04-08 11:45:06,912 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound20.i [2022-04-08 11:45:06,916 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-08 11:45:06,916 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-08 11:45:06,995 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-08 11:45:07,004 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 11:45:07,004 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-08 11:45:07,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 11:45:07,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-08 11:45:07,049 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 11:45:07,050 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 11:45:07,050 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 11:45:07,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 11:45:07,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1171333446, now seen corresponding path program 1 times [2022-04-08 11:45:07,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 11:45:07,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [912973285] [2022-04-08 11:45:07,082 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 11:45:07,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1171333446, now seen corresponding path program 2 times [2022-04-08 11:45:07,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 11:45:07,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187526340] [2022-04-08 11:45:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 11:45:07,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 11:45:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 11:45:07,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-08 11:45:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 11:45:07,290 INFO L290 TraceCheckUtils]: 0: Hoare triple {42#(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(10, 2); {33#true} is VALID [2022-04-08 11:45:07,290 INFO L290 TraceCheckUtils]: 1: Hoare triple {33#true} assume true; {33#true} is VALID [2022-04-08 11:45:07,291 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {33#true} {33#true} #84#return; {33#true} is VALID [2022-04-08 11:45:07,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-08 11:45:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 11:45:07,300 INFO L290 TraceCheckUtils]: 0: Hoare triple {33#true} ~cond := #in~cond; {33#true} is VALID [2022-04-08 11:45:07,301 INFO L290 TraceCheckUtils]: 1: Hoare triple {33#true} assume 0 == ~cond;assume false; {34#false} is VALID [2022-04-08 11:45:07,301 INFO L290 TraceCheckUtils]: 2: Hoare triple {34#false} assume true; {34#false} is VALID [2022-04-08 11:45:07,301 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {34#false} {33#true} #78#return; {34#false} is VALID [2022-04-08 11:45:07,302 INFO L272 TraceCheckUtils]: 0: Hoare triple {33#true} call ULTIMATE.init(); {42#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-08 11:45:07,303 INFO L290 TraceCheckUtils]: 1: Hoare triple {42#(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(10, 2); {33#true} is VALID [2022-04-08 11:45:07,303 INFO L290 TraceCheckUtils]: 2: Hoare triple {33#true} assume true; {33#true} is VALID [2022-04-08 11:45:07,303 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {33#true} {33#true} #84#return; {33#true} is VALID [2022-04-08 11:45:07,303 INFO L272 TraceCheckUtils]: 4: Hoare triple {33#true} call #t~ret2 := main(); {33#true} is VALID [2022-04-08 11:45:07,304 INFO L290 TraceCheckUtils]: 5: Hoare triple {33#true} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1; {33#true} is VALID [2022-04-08 11:45:07,304 INFO L272 TraceCheckUtils]: 6: Hoare triple {33#true} call assume_abort_if_not((if ~A~0 % 4294967296 >= 0 && ~A~0 % 4294967296 <= 20 then 1 else 0)); {33#true} is VALID [2022-04-08 11:45:07,304 INFO L290 TraceCheckUtils]: 7: Hoare triple {33#true} ~cond := #in~cond; {33#true} is VALID [2022-04-08 11:45:07,305 INFO L290 TraceCheckUtils]: 8: Hoare triple {33#true} assume 0 == ~cond;assume false; {34#false} is VALID [2022-04-08 11:45:07,305 INFO L290 TraceCheckUtils]: 9: Hoare triple {34#false} assume true; {34#false} is VALID [2022-04-08 11:45:07,305 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {34#false} {33#true} #78#return; {34#false} is VALID [2022-04-08 11:45:07,305 INFO L290 TraceCheckUtils]: 11: Hoare triple {34#false} ~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {34#false} is VALID [2022-04-08 11:45:07,306 INFO L290 TraceCheckUtils]: 12: Hoare triple {34#false} assume !true; {34#false} is VALID [2022-04-08 11:45:07,306 INFO L290 TraceCheckUtils]: 13: Hoare triple {34#false} assume !true; {34#false} is VALID [2022-04-08 11:45:07,306 INFO L272 TraceCheckUtils]: 14: Hoare triple {34#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {34#false} is VALID [2022-04-08 11:45:07,306 INFO L290 TraceCheckUtils]: 15: Hoare triple {34#false} ~cond := #in~cond; {34#false} is VALID [2022-04-08 11:45:07,307 INFO L290 TraceCheckUtils]: 16: Hoare triple {34#false} assume 0 == ~cond; {34#false} is VALID [2022-04-08 11:45:07,307 INFO L290 TraceCheckUtils]: 17: Hoare triple {34#false} assume !false; {34#false} is VALID [2022-04-08 11:45:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 11:45:07,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 11:45:07,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187526340] [2022-04-08 11:45:07,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187526340] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 11:45:07,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 11:45:07,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-08 11:45:07,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 11:45:07,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [912973285] [2022-04-08 11:45:07,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [912973285] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 11:45:07,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 11:45:07,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-08 11:45:07,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215272310] [2022-04-08 11:45:07,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 11:45:07,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-08 11:45:07,319 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 11:45:07,322 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:07,344 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 11:45:07,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-08 11:45:07,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 11:45:07,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-08 11:45:07,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-08 11:45:07,366 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 11:45:07,471 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2022-04-08 11:45:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-08 11:45:07,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-08 11:45:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 11:45:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2022-04-08 11:45:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2022-04-08 11:45:07,494 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 70 transitions. [2022-04-08 11:45:07,587 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 70 edges. 70 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 11:45:07,595 INFO L225 Difference]: With dead ends: 51 [2022-04-08 11:45:07,595 INFO L226 Difference]: Without dead ends: 25 [2022-04-08 11:45:07,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-08 11:45:07,601 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-08 11:45:07,602 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-08 11:45:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-08 11:45:07,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-08 11:45:07,631 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 11:45:07,652 INFO L82 GeneralOperation]: Start isEquivalent. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 11:45:07,653 INFO L74 IsIncluded]: Start isIncluded. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 11:45:07,653 INFO L87 Difference]: Start difference. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 11:45:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 11:45:07,657 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-04-08 11:45:07,657 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-08 11:45:07,658 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 11:45:07,658 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 11:45:07,658 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 25 states. [2022-04-08 11:45:07,659 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 25 states. [2022-04-08 11:45:07,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 11:45:07,662 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-04-08 11:45:07,662 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-08 11:45:07,663 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 11:45:07,663 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 11:45:07,663 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 11:45:07,663 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 11:45:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 11:45:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-04-08 11:45:07,667 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2022-04-08 11:45:07,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 11:45:07,668 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-04-08 11:45:07,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:07,668 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 25 states and 28 transitions. [2022-04-08 11:45:07,701 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 11:45:07,701 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-08 11:45:07,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-08 11:45:07,702 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 11:45:07,702 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 11:45:07,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-08 11:45:07,703 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 11:45:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 11:45:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash -73515422, now seen corresponding path program 1 times [2022-04-08 11:45:07,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 11:45:07,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2024495251] [2022-04-08 11:45:07,705 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 11:45:07,705 INFO L85 PathProgramCache]: Analyzing trace with hash -73515422, now seen corresponding path program 2 times [2022-04-08 11:45:07,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 11:45:07,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697254756] [2022-04-08 11:45:07,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 11:45:07,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 11:45:07,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 11:45:07,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284695188] [2022-04-08 11:45:07,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 11:45:07,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 11:45:07,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 11:45:07,728 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 11:45:07,732 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 11:45:07,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-08 11:45:07,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 11:45:07,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-08 11:45:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 11:45:07,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 11:45:08,271 INFO L272 TraceCheckUtils]: 0: Hoare triple {247#true} call ULTIMATE.init(); {247#true} is VALID [2022-04-08 11:45:08,272 INFO L290 TraceCheckUtils]: 1: Hoare triple {247#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(10, 2); {247#true} is VALID [2022-04-08 11:45:08,272 INFO L290 TraceCheckUtils]: 2: Hoare triple {247#true} assume true; {247#true} is VALID [2022-04-08 11:45:08,272 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {247#true} {247#true} #84#return; {247#true} is VALID [2022-04-08 11:45:08,272 INFO L272 TraceCheckUtils]: 4: Hoare triple {247#true} call #t~ret2 := main(); {247#true} is VALID [2022-04-08 11:45:08,273 INFO L290 TraceCheckUtils]: 5: Hoare triple {247#true} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1; {247#true} is VALID [2022-04-08 11:45:08,273 INFO L272 TraceCheckUtils]: 6: Hoare triple {247#true} call assume_abort_if_not((if ~A~0 % 4294967296 >= 0 && ~A~0 % 4294967296 <= 20 then 1 else 0)); {247#true} is VALID [2022-04-08 11:45:08,273 INFO L290 TraceCheckUtils]: 7: Hoare triple {247#true} ~cond := #in~cond; {247#true} is VALID [2022-04-08 11:45:08,273 INFO L290 TraceCheckUtils]: 8: Hoare triple {247#true} assume !(0 == ~cond); {247#true} is VALID [2022-04-08 11:45:08,274 INFO L290 TraceCheckUtils]: 9: Hoare triple {247#true} assume true; {247#true} is VALID [2022-04-08 11:45:08,274 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {247#true} {247#true} #78#return; {247#true} is VALID [2022-04-08 11:45:08,275 INFO L290 TraceCheckUtils]: 11: Hoare triple {247#true} ~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {285#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-08 11:45:08,276 INFO L290 TraceCheckUtils]: 12: Hoare triple {285#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !false; {285#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-08 11:45:08,277 INFO L290 TraceCheckUtils]: 13: Hoare triple {285#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {292#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-08 11:45:08,278 INFO L290 TraceCheckUtils]: 14: Hoare triple {292#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !false; {292#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-08 11:45:08,280 INFO L272 TraceCheckUtils]: 15: Hoare triple {292#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {299#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 11:45:08,281 INFO L290 TraceCheckUtils]: 16: Hoare triple {299#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {303#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 11:45:08,282 INFO L290 TraceCheckUtils]: 17: Hoare triple {303#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {248#false} is VALID [2022-04-08 11:45:08,282 INFO L290 TraceCheckUtils]: 18: Hoare triple {248#false} assume !false; {248#false} is VALID [2022-04-08 11:45:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 11:45:08,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-08 11:45:08,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 11:45:08,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697254756] [2022-04-08 11:45:08,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 11:45:08,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284695188] [2022-04-08 11:45:08,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284695188] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 11:45:08,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 11:45:08,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-08 11:45:08,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 11:45:08,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2024495251] [2022-04-08 11:45:08,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2024495251] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 11:45:08,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 11:45:08,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-08 11:45:08,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495151542] [2022-04-08 11:45:08,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 11:45:08,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-04-08 11:45:08,287 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 11:45:08,288 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:08,306 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 19 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 11:45:08,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-08 11:45:08,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 11:45:08,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-08 11:45:08,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-08 11:45:08,308 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 11:45:10,643 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-04-08 11:45:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-08 11:45:10,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-04-08 11:45:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 11:45:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 42 transitions. [2022-04-08 11:45:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 42 transitions. [2022-04-08 11:45:10,649 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 42 transitions. [2022-04-08 11:45:10,695 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 11:45:10,697 INFO L225 Difference]: With dead ends: 37 [2022-04-08 11:45:10,697 INFO L226 Difference]: Without dead ends: 34 [2022-04-08 11:45:10,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-04-08 11:45:10,699 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-08 11:45:10,700 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 92 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-08 11:45:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-08 11:45:10,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-08 11:45:10,714 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 11:45:10,714 INFO L82 GeneralOperation]: Start isEquivalent. First operand 34 states. Second operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 11:45:10,715 INFO L74 IsIncluded]: Start isIncluded. First operand 34 states. Second operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 11:45:10,715 INFO L87 Difference]: Start difference. First operand 34 states. Second operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 11:45:10,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 11:45:10,718 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-08 11:45:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-08 11:45:10,721 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 11:45:10,722 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 11:45:10,722 INFO L74 IsIncluded]: Start isIncluded. First operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 34 states. [2022-04-08 11:45:10,723 INFO L87 Difference]: Start difference. First operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 34 states. [2022-04-08 11:45:10,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 11:45:10,725 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-08 11:45:10,726 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-08 11:45:10,726 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 11:45:10,726 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 11:45:10,726 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 11:45:10,726 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 11:45:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 11:45:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-04-08 11:45:10,729 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2022-04-08 11:45:10,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 11:45:10,730 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-04-08 11:45:10,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:10,730 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 34 states and 38 transitions. [2022-04-08 11:45:10,787 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 11:45:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-08 11:45:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-08 11:45:10,795 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 11:45:10,797 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 11:45:10,823 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 11:45:10,997 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 11:45:10,998 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 11:45:10,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 11:45:10,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1211706883, now seen corresponding path program 1 times [2022-04-08 11:45:10,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 11:45:10,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [28347224] [2022-04-08 11:45:11,017 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-08 11:45:11,017 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 11:45:11,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1211706883, now seen corresponding path program 2 times [2022-04-08 11:45:11,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 11:45:11,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411684661] [2022-04-08 11:45:11,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 11:45:11,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 11:45:11,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 11:45:11,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9897636] [2022-04-08 11:45:11,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 11:45:11,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 11:45:11,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 11:45:11,060 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 11:45:11,082 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 11:45:11,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-08 11:45:11,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 11:45:11,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-08 11:45:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 11:45:11,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 11:45:11,558 INFO L272 TraceCheckUtils]: 0: Hoare triple {521#true} call ULTIMATE.init(); {521#true} is VALID [2022-04-08 11:45:11,558 INFO L290 TraceCheckUtils]: 1: Hoare triple {521#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(10, 2); {521#true} is VALID [2022-04-08 11:45:11,558 INFO L290 TraceCheckUtils]: 2: Hoare triple {521#true} assume true; {521#true} is VALID [2022-04-08 11:45:11,558 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {521#true} {521#true} #84#return; {521#true} is VALID [2022-04-08 11:45:11,559 INFO L272 TraceCheckUtils]: 4: Hoare triple {521#true} call #t~ret2 := main(); {521#true} is VALID [2022-04-08 11:45:11,559 INFO L290 TraceCheckUtils]: 5: Hoare triple {521#true} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1; {521#true} is VALID [2022-04-08 11:45:11,559 INFO L272 TraceCheckUtils]: 6: Hoare triple {521#true} call assume_abort_if_not((if ~A~0 % 4294967296 >= 0 && ~A~0 % 4294967296 <= 20 then 1 else 0)); {521#true} is VALID [2022-04-08 11:45:11,562 INFO L290 TraceCheckUtils]: 7: Hoare triple {521#true} ~cond := #in~cond; {547#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} is VALID [2022-04-08 11:45:11,562 INFO L290 TraceCheckUtils]: 8: Hoare triple {547#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} assume !(0 == ~cond); {551#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 11:45:11,564 INFO L290 TraceCheckUtils]: 9: Hoare triple {551#(not (= |assume_abort_if_not_#in~cond| 0))} assume true; {551#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 11:45:11,566 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {551#(not (= |assume_abort_if_not_#in~cond| 0))} {521#true} #78#return; {558#(<= (mod main_~A~0 4294967296) 20)} is VALID [2022-04-08 11:45:11,566 INFO L290 TraceCheckUtils]: 11: Hoare triple {558#(<= (mod main_~A~0 4294967296) 20)} ~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {562#(and (= main_~A~0 main_~r~0) (<= (mod main_~A~0 4294967296) 20) (= main_~q~0 0))} is VALID [2022-04-08 11:45:11,567 INFO L290 TraceCheckUtils]: 12: Hoare triple {562#(and (= main_~A~0 main_~r~0) (<= (mod main_~A~0 4294967296) 20) (= main_~q~0 0))} assume !false; {562#(and (= main_~A~0 main_~r~0) (<= (mod main_~A~0 4294967296) 20) (= main_~q~0 0))} is VALID [2022-04-08 11:45:11,568 INFO L290 TraceCheckUtils]: 13: Hoare triple {562#(and (= main_~A~0 main_~r~0) (<= (mod main_~A~0 4294967296) 20) (= main_~q~0 0))} assume !!(~r~0 % 4294967296 >= ~b~0 % 4294967296);~b~0 := 2 * ~b~0; {562#(and (= main_~A~0 main_~r~0) (<= (mod main_~A~0 4294967296) 20) (= main_~q~0 0))} is VALID [2022-04-08 11:45:11,568 INFO L290 TraceCheckUtils]: 14: Hoare triple {562#(and (= main_~A~0 main_~r~0) (<= (mod main_~A~0 4294967296) 20) (= main_~q~0 0))} assume !false; {562#(and (= main_~A~0 main_~r~0) (<= (mod main_~A~0 4294967296) 20) (= main_~q~0 0))} is VALID [2022-04-08 11:45:11,569 INFO L290 TraceCheckUtils]: 15: Hoare triple {562#(and (= main_~A~0 main_~r~0) (<= (mod main_~A~0 4294967296) 20) (= main_~q~0 0))} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {562#(and (= main_~A~0 main_~r~0) (<= (mod main_~A~0 4294967296) 20) (= main_~q~0 0))} is VALID [2022-04-08 11:45:11,569 INFO L290 TraceCheckUtils]: 16: Hoare triple {562#(and (= main_~A~0 main_~r~0) (<= (mod main_~A~0 4294967296) 20) (= main_~q~0 0))} assume !false; {562#(and (= main_~A~0 main_~r~0) (<= (mod main_~A~0 4294967296) 20) (= main_~q~0 0))} is VALID [2022-04-08 11:45:11,570 INFO L272 TraceCheckUtils]: 17: Hoare triple {562#(and (= main_~A~0 main_~r~0) (<= (mod main_~A~0 4294967296) 20) (= main_~q~0 0))} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {581#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 11:45:11,571 INFO L290 TraceCheckUtils]: 18: Hoare triple {581#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {585#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 11:45:11,571 INFO L290 TraceCheckUtils]: 19: Hoare triple {585#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {522#false} is VALID [2022-04-08 11:45:11,571 INFO L290 TraceCheckUtils]: 20: Hoare triple {522#false} assume !false; {522#false} is VALID [2022-04-08 11:45:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-08 11:45:11,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-08 11:45:11,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 11:45:11,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411684661] [2022-04-08 11:45:11,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 11:45:11,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9897636] [2022-04-08 11:45:11,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9897636] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 11:45:11,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 11:45:11,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-08 11:45:11,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 11:45:11,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [28347224] [2022-04-08 11:45:11,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [28347224] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 11:45:11,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 11:45:11,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-08 11:45:11,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590397479] [2022-04-08 11:45:11,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 11:45:11,574 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-04-08 11:45:11,574 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 11:45:11,575 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:11,596 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 20 edges. 20 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 11:45:11,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-08 11:45:11,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 11:45:11,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-08 11:45:11,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-04-08 11:45:11,597 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 11:45:12,006 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-04-08 11:45:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-08 11:45:12,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-04-08 11:45:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 11:45:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 41 transitions. [2022-04-08 11:45:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 41 transitions. [2022-04-08 11:45:12,011 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 8 states and 41 transitions. [2022-04-08 11:45:12,054 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 11:45:12,056 INFO L225 Difference]: With dead ends: 45 [2022-04-08 11:45:12,056 INFO L226 Difference]: Without dead ends: 42 [2022-04-08 11:45:12,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-08 11:45:12,058 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-08 11:45:12,059 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 88 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-08 11:45:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-08 11:45:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2022-04-08 11:45:12,083 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 11:45:12,083 INFO L82 GeneralOperation]: Start isEquivalent. First operand 42 states. Second operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 11:45:12,084 INFO L74 IsIncluded]: Start isIncluded. First operand 42 states. Second operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 11:45:12,084 INFO L87 Difference]: Start difference. First operand 42 states. Second operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 11:45:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 11:45:12,087 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-04-08 11:45:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-04-08 11:45:12,087 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 11:45:12,087 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 11:45:12,088 INFO L74 IsIncluded]: Start isIncluded. First operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 42 states. [2022-04-08 11:45:12,088 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 42 states. [2022-04-08 11:45:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 11:45:12,091 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-04-08 11:45:12,091 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-04-08 11:45:12,091 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 11:45:12,091 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 11:45:12,092 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 11:45:12,092 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 11:45:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 11:45:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-04-08 11:45:12,094 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2022-04-08 11:45:12,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 11:45:12,094 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-04-08 11:45:12,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 11:45:12,095 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 33 states and 37 transitions. [2022-04-08 11:45:12,145 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 37 edges. 37 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 11:45:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-04-08 11:45:12,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-08 11:45:12,146 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 11:45:12,146 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 11:45:12,173 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 11:45:12,346 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 11:45:12,347 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 11:45:12,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 11:45:12,348 INFO L85 PathProgramCache]: Analyzing trace with hash 947727214, now seen corresponding path program 1 times [2022-04-08 11:45:12,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 11:45:12,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [994806393] [2022-04-08 11:45:12,349 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 11:45:12,349 INFO L85 PathProgramCache]: Analyzing trace with hash 947727214, now seen corresponding path program 2 times [2022-04-08 11:45:12,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 11:45:12,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732980141] [2022-04-08 11:45:12,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 11:45:12,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 11:45:12,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 11:45:12,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644371591] [2022-04-08 11:45:12,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 11:45:12,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 11:45:12,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 11:45:12,364 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 11:45:12,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-08 11:45:12,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-08 11:45:12,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 11:45:12,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-08 11:45:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 11:45:12,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 11:45:12,526 INFO L272 TraceCheckUtils]: 0: Hoare triple {835#true} call ULTIMATE.init(); {835#true} is VALID [2022-04-08 11:45:12,527 INFO L290 TraceCheckUtils]: 1: Hoare triple {835#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(10, 2); {835#true} is VALID [2022-04-08 11:45:12,527 INFO L290 TraceCheckUtils]: 2: Hoare triple {835#true} assume true; {835#true} is VALID [2022-04-08 11:45:12,527 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {835#true} {835#true} #84#return; {835#true} is VALID [2022-04-08 11:45:12,528 INFO L272 TraceCheckUtils]: 4: Hoare triple {835#true} call #t~ret2 := main(); {835#true} is VALID [2022-04-08 11:45:12,528 INFO L290 TraceCheckUtils]: 5: Hoare triple {835#true} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1; {835#true} is VALID [2022-04-08 11:45:12,528 INFO L272 TraceCheckUtils]: 6: Hoare triple {835#true} call assume_abort_if_not((if ~A~0 % 4294967296 >= 0 && ~A~0 % 4294967296 <= 20 then 1 else 0)); {835#true} is VALID [2022-04-08 11:45:12,528 INFO L290 TraceCheckUtils]: 7: Hoare triple {835#true} ~cond := #in~cond; {835#true} is VALID [2022-04-08 11:45:12,529 INFO L290 TraceCheckUtils]: 8: Hoare triple {835#true} assume !(0 == ~cond); {835#true} is VALID [2022-04-08 11:45:12,529 INFO L290 TraceCheckUtils]: 9: Hoare triple {835#true} assume true; {835#true} is VALID [2022-04-08 11:45:12,529 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {835#true} {835#true} #78#return; {835#true} is VALID [2022-04-08 11:45:12,533 INFO L290 TraceCheckUtils]: 11: Hoare triple {835#true} ~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {873#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-08 11:45:12,534 INFO L290 TraceCheckUtils]: 12: Hoare triple {873#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} assume !false; {873#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-08 11:45:12,535 INFO L290 TraceCheckUtils]: 13: Hoare triple {873#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {873#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-08 11:45:12,535 INFO L290 TraceCheckUtils]: 14: Hoare triple {873#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} assume !false; {873#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-08 11:45:12,535 INFO L272 TraceCheckUtils]: 15: Hoare triple {873#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {835#true} is VALID [2022-04-08 11:45:12,536 INFO L290 TraceCheckUtils]: 16: Hoare triple {835#true} ~cond := #in~cond; {835#true} is VALID [2022-04-08 11:45:12,536 INFO L290 TraceCheckUtils]: 17: Hoare triple {835#true} assume !(0 == ~cond); {835#true} is VALID [2022-04-08 11:45:12,536 INFO L290 TraceCheckUtils]: 18: Hoare triple {835#true} assume true; {835#true} is VALID [2022-04-08 11:45:12,537 INFO L284 TraceCheckUtils]: 19: Hoare quadruple {835#true} {873#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} #80#return; {873#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-08 11:45:12,538 INFO L290 TraceCheckUtils]: 20: Hoare triple {873#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {836#false} is VALID [2022-04-08 11:45:12,538 INFO L290 TraceCheckUtils]: 21: Hoare triple {836#false} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {836#false} is VALID [2022-04-08 11:45:12,539 INFO L290 TraceCheckUtils]: 22: Hoare triple {836#false} assume !false; {836#false} is VALID [2022-04-08 11:45:12,539 INFO L272 TraceCheckUtils]: 23: Hoare triple {836#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {836#false} is VALID [2022-04-08 11:45:12,539 INFO L290 TraceCheckUtils]: 24: Hoare triple {836#false} ~cond := #in~cond; {836#false} is VALID [2022-04-08 11:45:12,539 INFO L290 TraceCheckUtils]: 25: Hoare triple {836#false} assume 0 == ~cond; {836#false} is VALID [2022-04-08 11:45:12,539 INFO L290 TraceCheckUtils]: 26: Hoare triple {836#false} assume !false; {836#false} is VALID [2022-04-08 11:45:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 11:45:12,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-08 11:45:12,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 11:45:12,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732980141] [2022-04-08 11:45:12,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 11:45:12,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644371591] [2022-04-08 11:45:12,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644371591] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 11:45:12,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 11:45:12,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-08 11:45:12,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 11:45:12,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [994806393] [2022-04-08 11:45:12,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [994806393] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 11:45:12,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 11:45:12,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-08 11:45:12,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478118949] [2022-04-08 11:45:12,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 11:45:12,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-04-08 11:45:12,543 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 11:45:12,544 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 11:45:12,568 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 27 edges. 27 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 11:45:12,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-08 11:45:12,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 11:45:12,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-08 11:45:12,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-08 11:45:12,570 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 11:45:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 11:45:12,681 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-04-08 11:45:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-08 11:45:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-04-08 11:45:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 11:45:12,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 11:45:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2022-04-08 11:45:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 11:45:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2022-04-08 11:45:12,686 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 48 transitions. [2022-04-08 11:45:12,728 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 48 edges. 48 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 11:45:12,729 INFO L225 Difference]: With dead ends: 57 [2022-04-08 11:45:12,730 INFO L226 Difference]: Without dead ends: 35 [2022-04-08 11:45:12,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 11:45:12,731 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-08 11:45:12,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-08 11:45:12,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-08 11:45:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-08 11:45:12,755 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 11:45:12,756 INFO L82 GeneralOperation]: Start isEquivalent. First operand 35 states. Second operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 11:45:12,756 INFO L74 IsIncluded]: Start isIncluded. First operand 35 states. Second operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 11:45:12,756 INFO L87 Difference]: Start difference. First operand 35 states. Second operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 11:45:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 11:45:12,758 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-04-08 11:45:12,758 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-04-08 11:45:12,759 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 11:45:12,759 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 11:45:12,759 INFO L74 IsIncluded]: Start isIncluded. First operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 35 states. [2022-04-08 11:45:12,759 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 35 states. [2022-04-08 11:45:12,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 11:45:12,761 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-04-08 11:45:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-04-08 11:45:12,761 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 11:45:12,762 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 11:45:12,762 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 11:45:12,762 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 11:45:12,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 11:45:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-04-08 11:45:12,764 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2022-04-08 11:45:12,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 11:45:12,764 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-04-08 11:45:12,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 11:45:12,764 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 35 states and 39 transitions. [2022-04-08 11:45:12,821 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 39 edges. 39 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 11:45:12,821 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-04-08 11:45:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-08 11:45:12,822 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 11:45:12,822 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 11:45:12,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-08 11:45:13,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 11:45:13,023 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 11:45:13,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 11:45:13,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1574040585, now seen corresponding path program 1 times [2022-04-08 11:45:13,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 11:45:13,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [430019904] [2022-04-08 11:45:13,027 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-08 11:45:13,027 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 11:45:13,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1574040585, now seen corresponding path program 2 times [2022-04-08 11:45:13,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 11:45:13,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344567613] [2022-04-08 11:45:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 11:45:13,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 11:45:13,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 11:45:13,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528719283] [2022-04-08 11:45:13,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 11:45:13,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 11:45:13,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 11:45:13,042 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-08 11:45:13,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process