/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/ps6-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-e106359-m [2022-04-15 17:20:13,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-15 17:20:13,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-15 17:20:13,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-15 17:20:13,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-15 17:20:13,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-15 17:20:13,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-15 17:20:13,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-15 17:20:13,503 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-15 17:20:13,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-15 17:20:13,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-15 17:20:13,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-15 17:20:13,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-15 17:20:13,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-15 17:20:13,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-15 17:20:13,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-15 17:20:13,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-15 17:20:13,506 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-15 17:20:13,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-15 17:20:13,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-15 17:20:13,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-15 17:20:13,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-15 17:20:13,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-15 17:20:13,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 17:20:13,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-15 17:20:13,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-15 17:20:13,507 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-15 17:20:13,507 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-15 17:20:13,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-15 17:20:13,507 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-15 17:20:13,507 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-15 17:20:13,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-15 17:20:13,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-15 17:20:13,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-15 17:20:13,703 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-15 17:20:13,705 INFO L275 PluginConnector]: CDTParser initialized [2022-04-15 17:20:13,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound20.c [2022-04-15 17:20:13,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4dbecff6/0369fa8a11f4491aab8f129f273651ba/FLAG7af39e319 [2022-04-15 17:20:14,085 INFO L306 CDTParser]: Found 1 translation units. [2022-04-15 17:20:14,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound20.c [2022-04-15 17:20:14,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4dbecff6/0369fa8a11f4491aab8f129f273651ba/FLAG7af39e319 [2022-04-15 17:20:14,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4dbecff6/0369fa8a11f4491aab8f129f273651ba [2022-04-15 17:20:14,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-15 17:20:14,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-15 17:20:14,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-15 17:20:14,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-15 17:20:14,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-15 17:20:14,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 05:20:14" (1/1) ... [2022-04-15 17:20:14,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dfe197d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 05:20:14, skipping insertion in model container [2022-04-15 17:20:14,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 05:20:14" (1/1) ... [2022-04-15 17:20:14,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-15 17:20:14,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-15 17:20:14,678 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/ps6-ll_unwindbound20.c[458,471] [2022-04-15 17:20:14,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 17:20:14,702 INFO L203 MainTranslator]: Completed pre-run [2022-04-15 17:20:14,709 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/ps6-ll_unwindbound20.c[458,471] [2022-04-15 17:20:14,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 17:20:14,723 INFO L208 MainTranslator]: Completed translation [2022-04-15 17:20:14,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 05:20:14 WrapperNode [2022-04-15 17:20:14,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-15 17:20:14,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-15 17:20:14,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-15 17:20:14,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-15 17:20:14,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 05:20:14" (1/1) ... [2022-04-15 17:20:14,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 05:20:14" (1/1) ... [2022-04-15 17:20:14,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 05:20:14" (1/1) ... [2022-04-15 17:20:14,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 05:20:14" (1/1) ... [2022-04-15 17:20:14,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 05:20:14" (1/1) ... [2022-04-15 17:20:14,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 05:20:14" (1/1) ... [2022-04-15 17:20:14,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 05:20:14" (1/1) ... [2022-04-15 17:20:14,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-15 17:20:14,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-15 17:20:14,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-15 17:20:14,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-15 17:20:14,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 05:20:14" (1/1) ... [2022-04-15 17:20:14,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 17:20:14,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 17:20:14,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-15 17:20:14,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-15 17:20:14,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-15 17:20:14,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-15 17:20:14,806 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-15 17:20:14,806 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-15 17:20:14,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-15 17:20:14,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-15 17:20:14,806 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-15 17:20:14,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-15 17:20:14,806 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-15 17:20:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-15 17:20:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-04-15 17:20:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-15 17:20:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-15 17:20:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-15 17:20:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-15 17:20:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-15 17:20:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-15 17:20:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-15 17:20:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-15 17:20:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-15 17:20:14,846 INFO L234 CfgBuilder]: Building ICFG [2022-04-15 17:20:14,847 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-15 17:20:14,983 INFO L275 CfgBuilder]: Performing block encoding [2022-04-15 17:20:15,000 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-15 17:20:15,000 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-15 17:20:15,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:20:15 BoogieIcfgContainer [2022-04-15 17:20:15,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-15 17:20:15,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-15 17:20:15,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-15 17:20:15,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-15 17:20:15,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 05:20:14" (1/3) ... [2022-04-15 17:20:15,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3c670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 05:20:15, skipping insertion in model container [2022-04-15 17:20:15,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 05:20:14" (2/3) ... [2022-04-15 17:20:15,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3c670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 05:20:15, skipping insertion in model container [2022-04-15 17:20:15,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:20:15" (3/3) ... [2022-04-15 17:20:15,006 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound20.c [2022-04-15 17:20:15,009 INFO L202 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-15 17:20:15,010 INFO L161 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-15 17:20:15,034 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-15 17:20:15,038 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-15 17:20:15,038 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-15 17:20:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 17:20:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-15 17:20:15,069 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 17:20:15,069 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 17:20:15,069 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 17:20:15,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 17:20:15,086 INFO L85 PathProgramCache]: Analyzing trace with hash 21872251, now seen corresponding path program 1 times [2022-04-15 17:20:15,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 17:20:15,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1159213906] [2022-04-15 17:20:15,099 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 17:20:15,099 INFO L85 PathProgramCache]: Analyzing trace with hash 21872251, now seen corresponding path program 2 times [2022-04-15 17:20:15,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 17:20:15,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459037515] [2022-04-15 17:20:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 17:20:15,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 17:20:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 17:20:15,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-15 17:20:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 17:20:15,244 INFO L290 TraceCheckUtils]: 0: Hoare triple {41#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {32#true} is VALID [2022-04-15 17:20:15,244 INFO L290 TraceCheckUtils]: 1: Hoare triple {32#true} assume true; {32#true} is VALID [2022-04-15 17:20:15,244 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {32#true} {32#true} #61#return; {32#true} is VALID [2022-04-15 17:20:15,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-15 17:20:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 17:20:15,257 INFO L290 TraceCheckUtils]: 0: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-04-15 17:20:15,258 INFO L290 TraceCheckUtils]: 1: Hoare triple {32#true} assume 0 == ~cond;assume false; {33#false} is VALID [2022-04-15 17:20:15,258 INFO L290 TraceCheckUtils]: 2: Hoare triple {33#false} assume true; {33#false} is VALID [2022-04-15 17:20:15,258 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {33#false} {32#true} #53#return; {33#false} is VALID [2022-04-15 17:20:15,260 INFO L272 TraceCheckUtils]: 0: Hoare triple {32#true} call ULTIMATE.init(); {41#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-15 17:20:15,260 INFO L290 TraceCheckUtils]: 1: Hoare triple {41#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {32#true} is VALID [2022-04-15 17:20:15,260 INFO L290 TraceCheckUtils]: 2: Hoare triple {32#true} assume true; {32#true} is VALID [2022-04-15 17:20:15,261 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {32#true} {32#true} #61#return; {32#true} is VALID [2022-04-15 17:20:15,261 INFO L272 TraceCheckUtils]: 4: Hoare triple {32#true} call #t~ret6 := main(); {32#true} is VALID [2022-04-15 17:20:15,262 INFO L290 TraceCheckUtils]: 5: Hoare triple {32#true} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -32768 <= #t~nondet4 && #t~nondet4 <= 32767;~k~0 := #t~nondet4;havoc #t~nondet4; {32#true} is VALID [2022-04-15 17:20:15,262 INFO L272 TraceCheckUtils]: 6: Hoare triple {32#true} call assume_abort_if_not((if ~k~0 <= 256 then 1 else 0)); {32#true} is VALID [2022-04-15 17:20:15,263 INFO L290 TraceCheckUtils]: 7: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-04-15 17:20:15,263 INFO L290 TraceCheckUtils]: 8: Hoare triple {32#true} assume 0 == ~cond;assume false; {33#false} is VALID [2022-04-15 17:20:15,263 INFO L290 TraceCheckUtils]: 9: Hoare triple {33#false} assume true; {33#false} is VALID [2022-04-15 17:20:15,264 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {33#false} {32#true} #53#return; {33#false} is VALID [2022-04-15 17:20:15,264 INFO L290 TraceCheckUtils]: 11: Hoare triple {33#false} ~y~0 := 0;~x~0 := 0;~c~0 := 0; {33#false} is VALID [2022-04-15 17:20:15,264 INFO L290 TraceCheckUtils]: 12: Hoare triple {33#false} assume !true; {33#false} is VALID [2022-04-15 17:20:15,264 INFO L272 TraceCheckUtils]: 13: Hoare triple {33#false} call __VERIFIER_assert((if 0 == -2 * ~y~0 * ~y~0 * ~y~0 * ~y~0 * ~y~0 * ~y~0 - 6 * ~y~0 * ~y~0 * ~y~0 * ~y~0 * ~y~0 - 5 * ~y~0 * ~y~0 * ~y~0 * ~y~0 + ~y~0 * ~y~0 + 12 * ~x~0 then 1 else 0)); {33#false} is VALID [2022-04-15 17:20:15,265 INFO L290 TraceCheckUtils]: 14: Hoare triple {33#false} ~cond := #in~cond; {33#false} is VALID [2022-04-15 17:20:15,266 INFO L290 TraceCheckUtils]: 15: Hoare triple {33#false} assume 0 == ~cond; {33#false} is VALID [2022-04-15 17:20:15,266 INFO L290 TraceCheckUtils]: 16: Hoare triple {33#false} assume !false; {33#false} is VALID [2022-04-15 17:20:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 17:20:15,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 17:20:15,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459037515] [2022-04-15 17:20:15,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459037515] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 17:20:15,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 17:20:15,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 17:20:15,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 17:20:15,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1159213906] [2022-04-15 17:20:15,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1159213906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 17:20:15,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 17:20:15,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 17:20:15,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867011656] [2022-04-15 17:20:15,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 17:20:15,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-15 17:20:15,277 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 17:20:15,279 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 17:20:15,303 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 17 edges. 17 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 17:20:15,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-15 17:20:15,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 17:20:15,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-15 17:20:15,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 17:20:15,329 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 17:20:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 17:20:15,643 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-04-15 17:20:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-15 17:20:15,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-15 17:20:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 17:20:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 17:20:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2022-04-15 17:20:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 17:20:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2022-04-15 17:20:15,655 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 65 transitions. [2022-04-15 17:20:15,710 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 65 edges. 65 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 17:20:15,716 INFO L225 Difference]: With dead ends: 50 [2022-04-15 17:20:15,716 INFO L226 Difference]: Without dead ends: 25 [2022-04-15 17:20:15,718 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 17:20:15,720 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-15 17:20:15,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-15 17:20:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-15 17:20:15,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-04-15 17:20:15,739 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 17:20:15,739 INFO L82 GeneralOperation]: Start isEquivalent. First operand 25 states. Second operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 17:20:15,740 INFO L74 IsIncluded]: Start isIncluded. First operand 25 states. Second operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 17:20:15,740 INFO L87 Difference]: Start difference. First operand 25 states. Second operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 17:20:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 17:20:15,743 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-04-15 17:20:15,743 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-15 17:20:15,743 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 17:20:15,743 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 17:20:15,744 INFO L74 IsIncluded]: Start isIncluded. First operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 25 states. [2022-04-15 17:20:15,744 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 25 states. [2022-04-15 17:20:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 17:20:15,746 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-04-15 17:20:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-15 17:20:15,746 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 17:20:15,746 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 17:20:15,747 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 17:20:15,747 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 17:20:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 17:20:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-04-15 17:20:15,749 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-04-15 17:20:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 17:20:15,749 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-04-15 17:20:15,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 17:20:15,750 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 24 states and 27 transitions. [2022-04-15 17:20:15,778 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 27 edges. 27 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 17:20:15,778 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-04-15 17:20:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-15 17:20:15,779 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 17:20:15,779 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 17:20:15,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-15 17:20:15,779 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 17:20:15,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 17:20:15,787 INFO L85 PathProgramCache]: Analyzing trace with hash -119968982, now seen corresponding path program 1 times [2022-04-15 17:20:15,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 17:20:15,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1466110843] [2022-04-15 17:20:15,788 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 17:20:15,788 INFO L85 PathProgramCache]: Analyzing trace with hash -119968982, now seen corresponding path program 2 times [2022-04-15 17:20:15,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 17:20:15,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760753605] [2022-04-15 17:20:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 17:20:15,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 17:20:15,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 17:20:15,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173073698] [2022-04-15 17:20:15,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 17:20:15,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 17:20:15,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 17:20:15,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 17:20:15,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-15 17:20:15,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 17:20:15,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 17:20:15,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-15 17:20:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 17:20:15,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 17:20:16,008 INFO L272 TraceCheckUtils]: 0: Hoare triple {242#true} call ULTIMATE.init(); {242#true} is VALID [2022-04-15 17:20:16,008 INFO L290 TraceCheckUtils]: 1: Hoare triple {242#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(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {250#(<= ~counter~0 0)} is VALID [2022-04-15 17:20:16,009 INFO L290 TraceCheckUtils]: 2: Hoare triple {250#(<= ~counter~0 0)} assume true; {250#(<= ~counter~0 0)} is VALID [2022-04-15 17:20:16,009 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {250#(<= ~counter~0 0)} {242#true} #61#return; {250#(<= ~counter~0 0)} is VALID [2022-04-15 17:20:16,010 INFO L272 TraceCheckUtils]: 4: Hoare triple {250#(<= ~counter~0 0)} call #t~ret6 := main(); {250#(<= ~counter~0 0)} is VALID [2022-04-15 17:20:16,010 INFO L290 TraceCheckUtils]: 5: Hoare triple {250#(<= ~counter~0 0)} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -32768 <= #t~nondet4 && #t~nondet4 <= 32767;~k~0 := #t~nondet4;havoc #t~nondet4; {250#(<= ~counter~0 0)} is VALID [2022-04-15 17:20:16,011 INFO L272 TraceCheckUtils]: 6: Hoare triple {250#(<= ~counter~0 0)} call assume_abort_if_not((if ~k~0 <= 256 then 1 else 0)); {250#(<= ~counter~0 0)} is VALID [2022-04-15 17:20:16,011 INFO L290 TraceCheckUtils]: 7: Hoare triple {250#(<= ~counter~0 0)} ~cond := #in~cond; {250#(<= ~counter~0 0)} is VALID [2022-04-15 17:20:16,012 INFO L290 TraceCheckUtils]: 8: Hoare triple {250#(<= ~counter~0 0)} assume !(0 == ~cond); {250#(<= ~counter~0 0)} is VALID [2022-04-15 17:20:16,012 INFO L290 TraceCheckUtils]: 9: Hoare triple {250#(<= ~counter~0 0)} assume true; {250#(<= ~counter~0 0)} is VALID [2022-04-15 17:20:16,012 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {250#(<= ~counter~0 0)} {250#(<= ~counter~0 0)} #53#return; {250#(<= ~counter~0 0)} is VALID [2022-04-15 17:20:16,013 INFO L290 TraceCheckUtils]: 11: Hoare triple {250#(<= ~counter~0 0)} ~y~0 := 0;~x~0 := 0;~c~0 := 0; {250#(<= ~counter~0 0)} is VALID [2022-04-15 17:20:16,013 INFO L290 TraceCheckUtils]: 12: Hoare triple {250#(<= ~counter~0 0)} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {284#(<= |main_#t~post5| 0)} is VALID [2022-04-15 17:20:16,014 INFO L290 TraceCheckUtils]: 13: Hoare triple {284#(<= |main_#t~post5| 0)} assume !(#t~post5 < 20);havoc #t~post5; {243#false} is VALID [2022-04-15 17:20:16,014 INFO L272 TraceCheckUtils]: 14: Hoare triple {243#false} call __VERIFIER_assert((if 0 == -2 * ~y~0 * ~y~0 * ~y~0 * ~y~0 * ~y~0 * ~y~0 - 6 * ~y~0 * ~y~0 * ~y~0 * ~y~0 * ~y~0 - 5 * ~y~0 * ~y~0 * ~y~0 * ~y~0 + ~y~0 * ~y~0 + 12 * ~x~0 then 1 else 0)); {243#false} is VALID [2022-04-15 17:20:16,014 INFO L290 TraceCheckUtils]: 15: Hoare triple {243#false} ~cond := #in~cond; {243#false} is VALID [2022-04-15 17:20:16,014 INFO L290 TraceCheckUtils]: 16: Hoare triple {243#false} assume 0 == ~cond; {243#false} is VALID [2022-04-15 17:20:16,014 INFO L290 TraceCheckUtils]: 17: Hoare triple {243#false} assume !false; {243#false} is VALID [2022-04-15 17:20:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 17:20:16,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 17:20:16,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 17:20:16,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760753605] [2022-04-15 17:20:16,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 17:20:16,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173073698] [2022-04-15 17:20:16,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173073698] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 17:20:16,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 17:20:16,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 17:20:16,017 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 17:20:16,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1466110843] [2022-04-15 17:20:16,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1466110843] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 17:20:16,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 17:20:16,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 17:20:16,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511396927] [2022-04-15 17:20:16,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 17:20:16,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-15 17:20:16,018 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 17:20:16,018 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 17:20:16,031 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 17:20:16,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-15 17:20:16,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 17:20:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-15 17:20:16,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-15 17:20:16,032 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 17:20:16,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 17:20:16,112 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-15 17:20:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-15 17:20:16,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-15 17:20:16,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 17:20:16,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 17:20:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2022-04-15 17:20:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 17:20:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2022-04-15 17:20:16,116 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 38 transitions. [2022-04-15 17:20:16,145 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 17:20:16,146 INFO L225 Difference]: With dead ends: 34 [2022-04-15 17:20:16,146 INFO L226 Difference]: Without dead ends: 26 [2022-04-15 17:20:16,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-15 17:20:16,148 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 17:20:16,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 17:20:16,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-15 17:20:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-15 17:20:16,161 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 17:20:16,162 INFO L82 GeneralOperation]: Start isEquivalent. First operand 26 states. Second operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 17:20:16,162 INFO L74 IsIncluded]: Start isIncluded. First operand 26 states. Second operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 17:20:16,162 INFO L87 Difference]: Start difference. First operand 26 states. Second operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 17:20:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 17:20:16,166 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-04-15 17:20:16,166 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-04-15 17:20:16,166 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 17:20:16,167 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 17:20:16,167 INFO L74 IsIncluded]: Start isIncluded. First operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 26 states. [2022-04-15 17:20:16,168 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 26 states. [2022-04-15 17:20:16,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 17:20:16,171 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-04-15 17:20:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-04-15 17:20:16,172 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 17:20:16,172 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 17:20:16,172 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 17:20:16,172 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 17:20:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 17:20:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-04-15 17:20:16,177 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2022-04-15 17:20:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 17:20:16,177 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-04-15 17:20:16,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 17:20:16,177 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 26 states and 29 transitions. [2022-04-15 17:20:16,200 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 29 edges. 29 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 17:20:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-04-15 17:20:16,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-15 17:20:16,202 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 17:20:16,204 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 17:20:16,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-15 17:20:16,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 17:20:16,420 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 17:20:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 17:20:16,420 INFO L85 PathProgramCache]: Analyzing trace with hash -118181522, now seen corresponding path program 1 times [2022-04-15 17:20:16,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 17:20:16,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [108790596] [2022-04-15 17:20:16,421 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 17:20:16,421 INFO L85 PathProgramCache]: Analyzing trace with hash -118181522, now seen corresponding path program 2 times [2022-04-15 17:20:16,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 17:20:16,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800113700] [2022-04-15 17:20:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 17:20:16,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 17:20:16,433 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 17:20:16,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088806786] [2022-04-15 17:20:16,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 17:20:16,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 17:20:16,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 17:20:16,445 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 17:20:16,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-15 17:20:16,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 17:20:16,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 17:20:16,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-15 17:20:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 17:20:16,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 17:20:16,590 INFO L272 TraceCheckUtils]: 0: Hoare triple {471#true} call ULTIMATE.init(); {471#true} is VALID [2022-04-15 17:20:16,590 INFO L290 TraceCheckUtils]: 1: Hoare triple {471#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(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {471#true} is VALID [2022-04-15 17:20:16,590 INFO L290 TraceCheckUtils]: 2: Hoare triple {471#true} assume true; {471#true} is VALID [2022-04-15 17:20:16,590 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {471#true} {471#true} #61#return; {471#true} is VALID [2022-04-15 17:20:16,590 INFO L272 TraceCheckUtils]: 4: Hoare triple {471#true} call #t~ret6 := main(); {471#true} is VALID [2022-04-15 17:20:16,591 INFO L290 TraceCheckUtils]: 5: Hoare triple {471#true} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -32768 <= #t~nondet4 && #t~nondet4 <= 32767;~k~0 := #t~nondet4;havoc #t~nondet4; {471#true} is VALID [2022-04-15 17:20:16,591 INFO L272 TraceCheckUtils]: 6: Hoare triple {471#true} call assume_abort_if_not((if ~k~0 <= 256 then 1 else 0)); {471#true} is VALID [2022-04-15 17:20:16,593 INFO L290 TraceCheckUtils]: 7: Hoare triple {471#true} ~cond := #in~cond; {471#true} is VALID [2022-04-15 17:20:16,593 INFO L290 TraceCheckUtils]: 8: Hoare triple {471#true} assume !(0 == ~cond); {471#true} is VALID [2022-04-15 17:20:16,594 INFO L290 TraceCheckUtils]: 9: Hoare triple {471#true} assume true; {471#true} is VALID [2022-04-15 17:20:16,594 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {471#true} {471#true} #53#return; {471#true} is VALID [2022-04-15 17:20:16,594 INFO L290 TraceCheckUtils]: 11: Hoare triple {471#true} ~y~0 := 0;~x~0 := 0;~c~0 := 0; {509#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-15 17:20:16,595 INFO L290 TraceCheckUtils]: 12: Hoare triple {509#(and (= main_~x~0 0) (= main_~y~0 0))} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {509#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-15 17:20:16,595 INFO L290 TraceCheckUtils]: 13: Hoare triple {509#(and (= main_~x~0 0) (= main_~y~0 0))} assume !!(#t~post5 < 20);havoc #t~post5; {509#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-15 17:20:16,596 INFO L272 TraceCheckUtils]: 14: Hoare triple {509#(and (= main_~x~0 0) (= main_~y~0 0))} call __VERIFIER_assert((if 0 == -2 * ~y~0 * ~y~0 * ~y~0 * ~y~0 * ~y~0 * ~y~0 - 6 * ~y~0 * ~y~0 * ~y~0 * ~y~0 * ~y~0 - 5 * ~y~0 * ~y~0 * ~y~0 * ~y~0 + ~y~0 * ~y~0 + 12 * ~x~0 then 1 else 0)); {519#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 17:20:16,597 INFO L290 TraceCheckUtils]: 15: Hoare triple {519#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {523#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 17:20:16,598 INFO L290 TraceCheckUtils]: 16: Hoare triple {523#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {472#false} is VALID [2022-04-15 17:20:16,599 INFO L290 TraceCheckUtils]: 17: Hoare triple {472#false} assume !false; {472#false} is VALID [2022-04-15 17:20:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 17:20:16,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 17:20:16,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 17:20:16,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800113700] [2022-04-15 17:20:16,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 17:20:16,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088806786] [2022-04-15 17:20:16,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088806786] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 17:20:16,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 17:20:16,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 17:20:16,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 17:20:16,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [108790596] [2022-04-15 17:20:16,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [108790596] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 17:20:16,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 17:20:16,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 17:20:16,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095150882] [2022-04-15 17:20:16,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 17:20:16,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-15 17:20:16,600 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 17:20:16,601 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 17:20:16,613 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 17:20:16,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-15 17:20:16,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 17:20:16,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-15 17:20:16,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-15 17:20:16,614 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 17:20:16,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 17:20:16,751 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-04-15 17:20:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-15 17:20:16,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-15 17:20:16,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 17:20:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 17:20:16,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-04-15 17:20:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 17:20:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-04-15 17:20:16,754 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 41 transitions. [2022-04-15 17:20:16,785 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 17:20:16,786 INFO L225 Difference]: With dead ends: 36 [2022-04-15 17:20:16,786 INFO L226 Difference]: Without dead ends: 32 [2022-04-15 17:20:16,786 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-15 17:20:16,787 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 17:20:16,787 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 87 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 17:20:16,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-15 17:20:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-15 17:20:16,800 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 17:20:16,800 INFO L82 GeneralOperation]: Start isEquivalent. First operand 32 states. Second operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-15 17:20:16,800 INFO L74 IsIncluded]: Start isIncluded. First operand 32 states. Second operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-15 17:20:16,800 INFO L87 Difference]: Start difference. First operand 32 states. Second operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-15 17:20:16,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 17:20:16,802 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-04-15 17:20:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-04-15 17:20:16,802 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 17:20:16,802 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 17:20:16,802 INFO L74 IsIncluded]: Start isIncluded. First operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand 32 states. [2022-04-15 17:20:16,802 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand 32 states. [2022-04-15 17:20:16,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 17:20:16,804 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-04-15 17:20:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-04-15 17:20:16,804 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 17:20:16,804 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 17:20:16,804 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 17:20:16,804 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 17:20:16,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-15 17:20:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-04-15 17:20:16,805 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-04-15 17:20:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 17:20:16,806 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-04-15 17:20:16,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 17:20:16,806 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 32 states and 35 transitions. [2022-04-15 17:20:16,835 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 35 edges. 35 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 17:20:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-04-15 17:20:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-15 17:20:16,836 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 17:20:16,836 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 17:20:16,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-15 17:20:17,036 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-15 17:20:17,036 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 17:20:17,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 17:20:17,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1364840471, now seen corresponding path program 1 times [2022-04-15 17:20:17,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 17:20:17,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1504441765]