/usr/bin/java -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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:47:11,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:47:11,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:47:11,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 08:47:11,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:47:11,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:47:11,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:47:11,640 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:47:11,663 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:47:11,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:47:11,665 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:47:11,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:47:11,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:47:11,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:47:11,667 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:47:11,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:47:11,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:47:11,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:47:11,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:47:11,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:47:11,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:47:11,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:47:11,669 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:47:11,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:47:11,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:47:11,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:47:11,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:47:11,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:47:11,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:47:11,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:47:11,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:47:11,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:47:11,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:47:11,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:47:11,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:47:11,671 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:47:11,672 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:47:11,672 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:47:11,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:47:11,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:47:11,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:47:11,930 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:47:11,931 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:47:11,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de41.c [2022-03-20 08:47:11,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d362c9bd/caeab44b84274817931d1813d97cfe17/FLAGa251e05bf [2022-03-20 08:47:12,354 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:47:12,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de41.c [2022-03-20 08:47:12,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d362c9bd/caeab44b84274817931d1813d97cfe17/FLAGa251e05bf [2022-03-20 08:47:12,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d362c9bd/caeab44b84274817931d1813d97cfe17 [2022-03-20 08:47:12,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:47:12,782 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:47:12,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:47:12,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:47:12,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:47:12,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:47:12" (1/1) ... [2022-03-20 08:47:12,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a35b02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:12, skipping insertion in model container [2022-03-20 08:47:12,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:47:12" (1/1) ... [2022-03-20 08:47:12,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:47:12,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:47:12,925 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de41.c[368,381] [2022-03-20 08:47:12,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:47:12,959 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:47:12,977 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de41.c[368,381] [2022-03-20 08:47:12,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:47:12,995 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:47:12,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:12 WrapperNode [2022-03-20 08:47:12,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:47:12,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:47:12,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:47:12,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:47:13,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:12" (1/1) ... [2022-03-20 08:47:13,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:12" (1/1) ... [2022-03-20 08:47:13,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:12" (1/1) ... [2022-03-20 08:47:13,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:12" (1/1) ... [2022-03-20 08:47:13,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:12" (1/1) ... [2022-03-20 08:47:13,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:12" (1/1) ... [2022-03-20 08:47:13,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:12" (1/1) ... [2022-03-20 08:47:13,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:47:13,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:47:13,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:47:13,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:47:13,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:12" (1/1) ... [2022-03-20 08:47:13,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:47:13,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:13,050 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) [2022-03-20 08:47:13,068 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 [2022-03-20 08:47:13,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:47:13,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:47:13,088 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:47:13,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:47:13,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:47:13,089 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:47:13,090 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:47:13,090 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:47:13,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:47:13,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 08:47:13,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:47:13,091 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:47:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:47:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:47:13,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:47:13,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:47:13,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:47:13,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:47:13,156 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:47:13,158 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:47:13,251 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:47:13,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:47:13,257 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-20 08:47:13,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:47:13 BoogieIcfgContainer [2022-03-20 08:47:13,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:47:13,258 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:47:13,259 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:47:13,259 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:47:13,261 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:47:13" (1/1) ... [2022-03-20 08:47:13,263 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:47:15,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:47:15 BasicIcfg [2022-03-20 08:47:15,097 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:47:15,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:47:15,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:47:15,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:47:15,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:47:12" (1/4) ... [2022-03-20 08:47:15,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa5974d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:47:15, skipping insertion in model container [2022-03-20 08:47:15,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:12" (2/4) ... [2022-03-20 08:47:15,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa5974d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:47:15, skipping insertion in model container [2022-03-20 08:47:15,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:47:13" (3/4) ... [2022-03-20 08:47:15,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa5974d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:47:15, skipping insertion in model container [2022-03-20 08:47:15,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:47:15" (4/4) ... [2022-03-20 08:47:15,110 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de41.cqvasr [2022-03-20 08:47:15,115 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:47:15,116 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:47:15,149 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:47:15,156 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-03-20 08:47:15,156 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:47:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:47:15,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:47:15,174 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:15,174 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:15,175 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:15,179 INFO L85 PathProgramCache]: Analyzing trace with hash -2015447748, now seen corresponding path program 1 times [2022-03-20 08:47:15,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:15,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183377034] [2022-03-20 08:47:15,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:15,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:15,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:15,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:15,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183377034] [2022-03-20 08:47:15,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183377034] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:47:15,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:47:15,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:47:15,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954793911] [2022-03-20 08:47:15,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:47:15,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:47:15,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:15,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:47:15,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:47:15,366 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:15,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:15,406 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-03-20 08:47:15,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:47:15,409 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 08:47:15,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:15,414 INFO L225 Difference]: With dead ends: 39 [2022-03-20 08:47:15,414 INFO L226 Difference]: Without dead ends: 16 [2022-03-20 08:47:15,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:47:15,420 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:15,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:47:15,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-20 08:47:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-20 08:47:15,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:15,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-03-20 08:47:15,447 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 15 [2022-03-20 08:47:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:15,448 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-03-20 08:47:15,448 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:15,448 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-03-20 08:47:15,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:47:15,449 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:15,449 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:15,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:47:15,449 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:15,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:15,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1389121438, now seen corresponding path program 1 times [2022-03-20 08:47:15,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:15,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129945889] [2022-03-20 08:47:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:15,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:15,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:15,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:15,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129945889] [2022-03-20 08:47:15,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129945889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:47:15,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:47:15,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 08:47:15,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947142494] [2022-03-20 08:47:15,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:47:15,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:47:15,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:15,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:47:15,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:47:15,827 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:15,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:15,959 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2022-03-20 08:47:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 08:47:15,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 08:47:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:15,967 INFO L225 Difference]: With dead ends: 30 [2022-03-20 08:47:15,967 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 08:47:15,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 08:47:15,974 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:15,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 32 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:47:15,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 08:47:15,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-03-20 08:47:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-03-20 08:47:15,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 15 [2022-03-20 08:47:15,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:15,995 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-03-20 08:47:15,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:15,995 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-03-20 08:47:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 08:47:15,996 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:15,996 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:15,996 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:47:15,996 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:15,997 INFO L85 PathProgramCache]: Analyzing trace with hash 139812261, now seen corresponding path program 1 times [2022-03-20 08:47:15,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:15,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076859694] [2022-03-20 08:47:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:15,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:16,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:16,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:16,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076859694] [2022-03-20 08:47:16,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076859694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:47:16,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448530235] [2022-03-20 08:47:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:16,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:16,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:16,249 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) [2022-03-20 08:47:16,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:47:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:16,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 08:47:16,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:47:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:16,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:47:19,138 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((aux_mod_v_main_~y~0_16_31 Int)) (or (< 0 (mod (+ (* 4294967295 aux_mod_v_main_~y~0_16_31) c_main_~x~0 c_main_~y~0) 4294967296)) (< aux_mod_v_main_~y~0_16_31 0) (< c_main_~n~0 (+ (* (div c_main_~n~0 4294967296) 4294967296) aux_mod_v_main_~y~0_16_31 1)))) (forall ((aux_mod_v_main_~y~0_16_31 Int)) (or (< 0 (mod (+ (* 4294967295 aux_mod_v_main_~y~0_16_31) c_main_~x~0 c_main_~y~0) 4294967296)) (<= (+ (* (div c_main_~n~0 4294967296) 4294967296) aux_mod_v_main_~y~0_16_31) c_main_~n~0) (<= 4294967296 aux_mod_v_main_~y~0_16_31)))) is different from false [2022-03-20 08:47:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-03-20 08:47:21,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448530235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:47:21,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:47:21,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-20 08:47:21,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459552780] [2022-03-20 08:47:21,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:47:21,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 08:47:21,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:21,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 08:47:21,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=161, Unknown=2, NotChecked=26, Total=240 [2022-03-20 08:47:21,725 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:25,964 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse4 (div c_main_~y~0 4294967296))) (let ((.cse5 (div c_main_~n~0 4294967296)) (.cse3 (* 4294967296 .cse4))) (let ((.cse7 (+ .cse3 c_main_~n~0)) (.cse6 (* .cse5 4294967296))) (let ((.cse1 (< .cse7 (+ .cse6 c_main_~y~0 1))) (.cse0 (<= (+ .cse6 c_main_~y~0) .cse7)) (.cse2 (+ c_main_~x~0 c_main_~y~0))) (and (= |c_#NULL.base| |c_old(#NULL.base)|) (forall ((aux_mod_v_main_~y~0_16_31 Int)) (or (< 0 (mod (+ (* 4294967295 aux_mod_v_main_~y~0_16_31) c_main_~x~0 c_main_~y~0) 4294967296)) (< aux_mod_v_main_~y~0_16_31 0) (< c_main_~n~0 (+ (* (div c_main_~n~0 4294967296) 4294967296) aux_mod_v_main_~y~0_16_31 1)))) .cse0 (or .cse1 (<= c_main_~n~0 .cse2)) .cse1 (forall ((aux_mod_v_main_~y~0_16_31 Int)) (or (< 0 (mod (+ (* 4294967295 aux_mod_v_main_~y~0_16_31) c_main_~x~0 c_main_~y~0) 4294967296)) (<= (+ (* (div c_main_~n~0 4294967296) 4294967296) aux_mod_v_main_~y~0_16_31) c_main_~n~0) (<= 4294967296 aux_mod_v_main_~y~0_16_31))) (or .cse0 (<= (+ .cse3 (* (div c_main_~x~0 4294967296) 4294967296) 4294967296) .cse2)) (<= (+ (div (+ c_main_~x~0 1) 4294967296) .cse4) .cse5) (= |c_#NULL.offset| |c_old(#NULL.offset)|)))))) is different from false [2022-03-20 08:47:26,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:26,222 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2022-03-20 08:47:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 08:47:26,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-20 08:47:26,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:26,224 INFO L225 Difference]: With dead ends: 40 [2022-03-20 08:47:26,224 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 08:47:26,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=130, Invalid=427, Unknown=3, NotChecked=90, Total=650 [2022-03-20 08:47:26,226 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:26,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 46 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 108 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-03-20 08:47:26,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 08:47:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2022-03-20 08:47:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2022-03-20 08:47:26,233 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2022-03-20 08:47:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:26,233 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2022-03-20 08:47:26,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2022-03-20 08:47:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 08:47:26,234 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:26,234 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:26,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 08:47:26,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:26,448 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1590526661, now seen corresponding path program 1 times [2022-03-20 08:47:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:26,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657061501] [2022-03-20 08:47:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:26,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:26,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:26,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:26,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657061501] [2022-03-20 08:47:26,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657061501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:47:26,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335197049] [2022-03-20 08:47:26,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:26,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:26,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:26,787 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) [2022-03-20 08:47:26,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:47:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 08:47:26,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:47:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:27,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:47:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:28,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335197049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:47:28,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:47:28,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2022-03-20 08:47:28,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146520076] [2022-03-20 08:47:28,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:47:28,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 08:47:28,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:28,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 08:47:28,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-20 08:47:28,922 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:29,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:29,643 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2022-03-20 08:47:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 08:47:29,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-20 08:47:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:29,644 INFO L225 Difference]: With dead ends: 54 [2022-03-20 08:47:29,645 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 08:47:29,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2022-03-20 08:47:29,646 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:29,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 64 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 232 Invalid, 0 Unknown, 33 Unchecked, 0.3s Time] [2022-03-20 08:47:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 08:47:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-03-20 08:47:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-03-20 08:47:29,654 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 16 [2022-03-20 08:47:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:29,654 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-03-20 08:47:29,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-03-20 08:47:29,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 08:47:29,655 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:29,655 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:29,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 08:47:29,871 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,SelfDestructingSolverStorable3 [2022-03-20 08:47:29,872 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:29,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1930032162, now seen corresponding path program 1 times [2022-03-20 08:47:29,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:29,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143485965] [2022-03-20 08:47:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:29,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:30,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:30,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:30,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143485965] [2022-03-20 08:47:30,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143485965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:47:30,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431064041] [2022-03-20 08:47:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:30,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:30,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:30,228 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) [2022-03-20 08:47:30,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:47:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:30,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 08:47:30,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:47:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:30,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:47:32,901 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((aux_mod_v_main_~y~0_22_31 Int)) (or (< c_main_~n~0 (+ (* (div c_main_~n~0 4294967296) 4294967296) aux_mod_v_main_~y~0_22_31 1)) (< aux_mod_v_main_~y~0_22_31 0) (< 0 (mod (+ (* 4294967295 aux_mod_v_main_~y~0_22_31) c_main_~x~0 c_main_~y~0) 4294967296)))) (forall ((aux_mod_v_main_~y~0_22_31 Int)) (or (<= (+ (* (div c_main_~n~0 4294967296) 4294967296) aux_mod_v_main_~y~0_22_31) c_main_~n~0) (<= 4294967296 aux_mod_v_main_~y~0_22_31) (< 0 (mod (+ (* 4294967295 aux_mod_v_main_~y~0_22_31) c_main_~x~0 c_main_~y~0) 4294967296))))) is different from false [2022-03-20 08:47:39,275 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_mod_v_main_~z~0_15_31 Int)) (or (< aux_mod_v_main_~z~0_15_31 0) (< 0 aux_mod_v_main_~z~0_15_31) (and (forall ((aux_mod_v_main_~y~0_22_31 Int)) (or (<= (+ (* (div c_main_~n~0 4294967296) 4294967296) aux_mod_v_main_~y~0_22_31) c_main_~n~0) (<= 4294967296 aux_mod_v_main_~y~0_22_31) (< 0 (mod (+ (* 4294967295 aux_mod_v_main_~y~0_22_31) (* aux_mod_v_main_~z~0_15_31 4294967295) c_main_~x~0 c_main_~y~0 c_main_~z~0) 4294967296)))) (forall ((aux_mod_v_main_~y~0_22_31 Int)) (or (< c_main_~n~0 (+ (* (div c_main_~n~0 4294967296) 4294967296) aux_mod_v_main_~y~0_22_31 1)) (< aux_mod_v_main_~y~0_22_31 0) (< 0 (mod (+ (* 4294967295 aux_mod_v_main_~y~0_22_31) (* aux_mod_v_main_~z~0_15_31 4294967295) c_main_~x~0 c_main_~y~0 c_main_~z~0) 4294967296))))))) is different from false [2022-03-20 08:47:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-03-20 08:47:44,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431064041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:47:44,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:47:44,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 23 [2022-03-20 08:47:44,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507130150] [2022-03-20 08:47:44,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:47:44,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 08:47:44,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:44,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 08:47:44,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=322, Unknown=3, NotChecked=78, Total=506 [2022-03-20 08:47:44,004 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:46,271 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~x~0 c_main_~z~0))) (and (= |c_#NULL.base| |c_old(#NULL.base)|) (= .cse0 c_main_~n~0) (<= .cse0 (* (div .cse0 4294967296) 4294967296)) (= c_main_~y~0 0) (<= c_main_~n~0 (* (div c_main_~n~0 4294967296) 4294967296)) (<= c_main_~n~0 .cse0) (<= (+ c_main_~x~0 (* (div (+ (* (- 1) c_main_~x~0) 4294967295 c_main_~n~0) 4294967296) 4294967296)) c_main_~n~0) (forall ((aux_mod_v_main_~y~0_22_31 Int)) (or (< c_main_~n~0 (+ (* (div c_main_~n~0 4294967296) 4294967296) aux_mod_v_main_~y~0_22_31 1)) (< aux_mod_v_main_~y~0_22_31 0) (< 0 (mod (+ (* 4294967295 aux_mod_v_main_~y~0_22_31) c_main_~x~0 c_main_~y~0) 4294967296)))) (<= (+ (* (div (+ c_main_~z~0 1) 4294967296) 4294967296) c_main_~x~0) c_main_~n~0) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (forall ((aux_mod_v_main_~y~0_22_31 Int)) (or (<= (+ (* (div c_main_~n~0 4294967296) 4294967296) aux_mod_v_main_~y~0_22_31) c_main_~n~0) (<= 4294967296 aux_mod_v_main_~y~0_22_31) (< 0 (mod (+ (* 4294967295 aux_mod_v_main_~y~0_22_31) c_main_~x~0 c_main_~y~0) 4294967296)))))) is different from false [2022-03-20 08:47:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:48,559 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2022-03-20 08:47:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 08:47:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 08:47:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:48,560 INFO L225 Difference]: With dead ends: 45 [2022-03-20 08:47:48,561 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 08:47:48,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=229, Invalid=771, Unknown=4, NotChecked=186, Total=1190 [2022-03-20 08:47:48,562 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:48,563 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 49 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 90 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2022-03-20 08:47:48,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 08:47:48,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-03-20 08:47:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2022-03-20 08:47:48,570 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 17 [2022-03-20 08:47:48,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:48,570 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2022-03-20 08:47:48,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2022-03-20 08:47:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 08:47:48,571 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:48,571 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:48,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 08:47:48,785 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:48,786 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:48,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:48,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1481938624, now seen corresponding path program 1 times [2022-03-20 08:47:48,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:48,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817318234] [2022-03-20 08:47:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:48,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:49,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:49,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817318234] [2022-03-20 08:47:49,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817318234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:47:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154277163] [2022-03-20 08:47:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:49,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:49,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:49,198 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) [2022-03-20 08:47:49,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:47:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:49,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 08:47:49,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:47:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:49,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:47:51,926 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((aux_mod_v_main_~y~0_25_31 Int)) (or (< 0 (mod (+ (* 4294967295 aux_mod_v_main_~y~0_25_31) c_main_~x~0 c_main_~y~0) 4294967296)) (< c_main_~n~0 (+ (* (div c_main_~n~0 4294967296) 4294967296) aux_mod_v_main_~y~0_25_31 1)) (< aux_mod_v_main_~y~0_25_31 0))) (forall ((aux_mod_v_main_~y~0_25_31 Int)) (or (<= (+ (* (div c_main_~n~0 4294967296) 4294967296) aux_mod_v_main_~y~0_25_31) c_main_~n~0) (< 0 (mod (+ (* 4294967295 aux_mod_v_main_~y~0_25_31) c_main_~x~0 c_main_~y~0) 4294967296)) (<= 4294967296 aux_mod_v_main_~y~0_25_31)))) is different from false [2022-03-20 08:48:08,953 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_mod_v_main_~z~0_20_31 Int)) (or (and (forall ((aux_mod_v_main_~y~0_25_31 Int)) (or (< c_main_~n~0 (+ (* (div c_main_~n~0 4294967296) 4294967296) aux_mod_v_main_~y~0_25_31 1)) (< aux_mod_v_main_~y~0_25_31 0) (< 0 (mod (+ (* aux_mod_v_main_~z~0_20_31 4294967295) (* 4294967295 aux_mod_v_main_~y~0_25_31) c_main_~x~0 c_main_~z~0) 4294967296)))) (forall ((aux_mod_v_main_~y~0_25_31 Int)) (or (<= (+ (* (div c_main_~n~0 4294967296) 4294967296) aux_mod_v_main_~y~0_25_31) c_main_~n~0) (<= 4294967296 aux_mod_v_main_~y~0_25_31) (< 0 (mod (+ (* aux_mod_v_main_~z~0_20_31 4294967295) (* 4294967295 aux_mod_v_main_~y~0_25_31) c_main_~x~0 c_main_~z~0) 4294967296))))) (< aux_mod_v_main_~z~0_20_31 0) (< 0 aux_mod_v_main_~z~0_20_31))) is different from false [2022-03-20 08:48:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-03-20 08:48:31,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154277163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:48:31,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:48:31,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-03-20 08:48:31,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131257506] [2022-03-20 08:48:31,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:48:31,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 08:48:31,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:48:31,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 08:48:31,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=438, Unknown=15, NotChecked=90, Total=650 [2022-03-20 08:48:31,919 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:48:35,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:48:35,140 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2022-03-20 08:48:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 08:48:35,140 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 08:48:35,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:48:35,141 INFO L225 Difference]: With dead ends: 42 [2022-03-20 08:48:35,141 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 08:48:35,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=248, Invalid=866, Unknown=16, NotChecked=130, Total=1260 [2022-03-20 08:48:35,143 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:48:35,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 69 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 156 Invalid, 0 Unknown, 104 Unchecked, 0.4s Time] [2022-03-20 08:48:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 08:48:35,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 08:48:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:48:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2022-03-20 08:48:35,149 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 18 [2022-03-20 08:48:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:48:35,149 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2022-03-20 08:48:35,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:48:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-03-20 08:48:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 08:48:35,150 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:48:35,150 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:48:35,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:48:35,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:48:35,355 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:48:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:48:35,356 INFO L85 PathProgramCache]: Analyzing trace with hash 342824421, now seen corresponding path program 1 times [2022-03-20 08:48:35,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:48:35,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107427289] [2022-03-20 08:48:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:48:35,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:48:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:48:35,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:48:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:48:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:48:35,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:48:35,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107427289] [2022-03-20 08:48:35,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107427289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:48:35,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616719783] [2022-03-20 08:48:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:48:35,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:48:35,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:48:35,752 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:48:35,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 08:48:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:48:35,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 08:48:35,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:48:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:48:36,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:49:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:49:01,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616719783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:49:01,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:49:01,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2022-03-20 08:49:01,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562064967] [2022-03-20 08:49:01,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:49:01,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 08:49:01,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:49:01,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 08:49:01,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=375, Unknown=8, NotChecked=0, Total=506 [2022-03-20 08:49:01,585 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:49:04,641 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2022-03-20 08:49:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 08:49:04,642 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 08:49:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:49:04,643 INFO L225 Difference]: With dead ends: 50 [2022-03-20 08:49:04,643 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 08:49:04,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=294, Invalid=887, Unknown=9, NotChecked=0, Total=1190 [2022-03-20 08:49:04,644 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:49:04,644 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 53 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 134 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-03-20 08:49:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 08:49:04,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2022-03-20 08:49:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-03-20 08:49:04,650 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 18 [2022-03-20 08:49:04,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:49:04,650 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-03-20 08:49:04,650 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:04,650 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-03-20 08:49:04,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 08:49:04,650 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:49:04,650 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:49:04,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 08:49:04,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:49:04,851 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:49:04,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:49:04,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1653141179, now seen corresponding path program 1 times [2022-03-20 08:49:04,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:49:04,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682248430] [2022-03-20 08:49:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:49:04,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:49:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:05,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:49:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:05,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:49:05,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682248430] [2022-03-20 08:49:05,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682248430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:49:05,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600177775] [2022-03-20 08:49:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:49:05,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:49:05,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:49:05,112 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:49:05,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 08:49:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:05,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 08:49:05,345 INFO L286 TraceCheckSpWp]: Computing forward predicates...