/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.error.function.in.sv-comp.mode false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread-wmm/mix047_power.oepc_pso.oepc_rmo.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-53ca081-m [2022-09-16 10:31:01,124 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2022-09-16 10:31:01,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-16 10:31:01,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-16 10:31:01,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-16 10:31:01,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-16 10:31:01,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-16 10:31:01,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-16 10:31:01,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-16 10:31:01,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-16 10:31:01,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-16 10:31:01,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-16 10:31:01,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-16 10:31:01,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-16 10:31:01,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-09-16 10:31:01,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-16 10:31:01,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-16 10:31:01,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-16 10:31:01,222 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-09-16 10:31:01,254 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-16 10:31:01,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-16 10:31:01,254 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-09-16 10:31:01,255 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-09-16 10:31:01,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-16 10:31:01,255 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-16 10:31:01,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-16 10:31:01,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-16 10:31:01,256 INFO L138 SettingsManager]: * Use SBE=true [2022-09-16 10:31:01,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-16 10:31:01,257 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-16 10:31:01,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-16 10:31:01,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-16 10:31:01,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-16 10:31:01,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-16 10:31:01,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-16 10:31:01,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-16 10:31:01,258 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-16 10:31:01,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-16 10:31:01,258 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-16 10:31:01,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-16 10:31:01,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-16 10:31:01,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-16 10:31:01,259 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-16 10:31:01,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-16 10:31:01,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 10:31:01,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-16 10:31:01,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-16 10:31:01,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-16 10:31:01,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-16 10:31:01,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-16 10:31:01,260 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-16 10:31:01,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-09-16 10:31:01,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of error function in SV-COMP mode -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2022-09-16 10:31:01,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-16 10:31:01,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-16 10:31:01,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-16 10:31:01,520 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-16 10:31:01,520 INFO L275 PluginConnector]: CDTParser initialized [2022-09-16 10:31:01,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix047_power.oepc_pso.oepc_rmo.oepc.i [2022-09-16 10:31:01,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/897ba7eed/3850a6ed9e7f4cf6b943b0d6f74dadf3/FLAG54292aaba [2022-09-16 10:31:01,997 INFO L306 CDTParser]: Found 1 translation units. [2022-09-16 10:31:01,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix047_power.oepc_pso.oepc_rmo.oepc.i [2022-09-16 10:31:02,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/897ba7eed/3850a6ed9e7f4cf6b943b0d6f74dadf3/FLAG54292aaba [2022-09-16 10:31:02,358 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/897ba7eed/3850a6ed9e7f4cf6b943b0d6f74dadf3 [2022-09-16 10:31:02,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-16 10:31:02,361 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-16 10:31:02,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-16 10:31:02,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-16 10:31:02,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-16 10:31:02,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 10:31:02" (1/1) ... [2022-09-16 10:31:02,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25da87dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:31:02, skipping insertion in model container [2022-09-16 10:31:02,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 10:31:02" (1/1) ... [2022-09-16 10:31:02,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-16 10:31:02,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-16 10:31:02,589 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix047_power.oepc_pso.oepc_rmo.oepc.i[969,982] [2022-09-16 10:31:02,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 10:31:02,789 INFO L203 MainTranslator]: Completed pre-run [2022-09-16 10:31:02,802 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix047_power.oepc_pso.oepc_rmo.oepc.i[969,982] [2022-09-16 10:31:02,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 10:31:02,903 INFO L208 MainTranslator]: Completed translation [2022-09-16 10:31:02,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:31:02 WrapperNode [2022-09-16 10:31:02,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-16 10:31:02,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-16 10:31:02,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-16 10:31:02,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-16 10:31:02,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:31:02" (1/1) ... [2022-09-16 10:31:02,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:31:02" (1/1) ... [2022-09-16 10:31:02,981 INFO L138 Inliner]: procedures = 177, calls = 71, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 194 [2022-09-16 10:31:02,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-16 10:31:02,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-16 10:31:02,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-16 10:31:02,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-16 10:31:02,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:31:02" (1/1) ... [2022-09-16 10:31:02,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:31:02" (1/1) ... [2022-09-16 10:31:03,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:31:02" (1/1) ... [2022-09-16 10:31:03,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:31:02" (1/1) ... [2022-09-16 10:31:03,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:31:02" (1/1) ... [2022-09-16 10:31:03,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:31:02" (1/1) ... [2022-09-16 10:31:03,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:31:02" (1/1) ... [2022-09-16 10:31:03,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-16 10:31:03,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-16 10:31:03,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-16 10:31:03,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-16 10:31:03,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:31:02" (1/1) ... [2022-09-16 10:31:03,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 10:31:03,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 10:31:03,092 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) [2022-09-16 10:31:03,104 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 [2022-09-16 10:31:03,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-16 10:31:03,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-16 10:31:03,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-16 10:31:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-16 10:31:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-16 10:31:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-09-16 10:31:03,141 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-09-16 10:31:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-09-16 10:31:03,142 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-09-16 10:31:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-09-16 10:31:03,143 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-09-16 10:31:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2022-09-16 10:31:03,143 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2022-09-16 10:31:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-16 10:31:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-16 10:31:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-16 10:31:03,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-16 10:31:03,145 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-16 10:31:03,290 INFO L234 CfgBuilder]: Building ICFG [2022-09-16 10:31:03,298 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-16 10:31:03,852 INFO L275 CfgBuilder]: Performing block encoding [2022-09-16 10:31:04,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-16 10:31:04,219 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-09-16 10:31:04,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 10:31:04 BoogieIcfgContainer [2022-09-16 10:31:04,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-16 10:31:04,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-16 10:31:04,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-16 10:31:04,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-16 10:31:04,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 10:31:02" (1/3) ... [2022-09-16 10:31:04,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da0456f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 10:31:04, skipping insertion in model container [2022-09-16 10:31:04,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:31:02" (2/3) ... [2022-09-16 10:31:04,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da0456f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 10:31:04, skipping insertion in model container [2022-09-16 10:31:04,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 10:31:04" (3/3) ... [2022-09-16 10:31:04,229 INFO L112 eAbstractionObserver]: Analyzing ICFG mix047_power.oepc_pso.oepc_rmo.oepc.i [2022-09-16 10:31:04,236 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-09-16 10:31:04,244 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-16 10:31:04,244 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-09-16 10:31:04,244 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-16 10:31:04,335 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-09-16 10:31:04,376 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 155 places, 144 transitions, 308 flow [2022-09-16 10:31:17,080 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 401144 states, 401064 states have (on average 4.624683342309456) internal successors, (1854794), 401143 states have internal predecessors, (1854794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:31:17,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 10:31:17,134 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@242321fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 10:31:17,134 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-09-16 10:31:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 401144 states, 401064 states have (on average 4.624683342309456) internal successors, (1854794), 401143 states have internal predecessors, (1854794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:31:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-09-16 10:31:17,975 INFO L187 NwaCegarLoop]: Found error trace [2022-09-16 10:31:17,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 10:31:17,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [P0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, P0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, P1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, P1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-09-16 10:31:17,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 10:31:17,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1081249954, now seen corresponding path program 1 times [2022-09-16 10:31:17,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 10:31:17,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092285896] [2022-09-16 10:31:17,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 10:31:17,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 10:31:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 10:31:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 10:31:18,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 10:31:18,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092285896] [2022-09-16 10:31:18,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092285896] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 10:31:18,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 10:31:18,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-16 10:31:18,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905401528] [2022-09-16 10:31:18,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 10:31:18,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-16 10:31:18,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 10:31:18,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-16 10:31:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-16 10:31:19,336 INFO L87 Difference]: Start difference. First operand has 401144 states, 401064 states have (on average 4.624683342309456) internal successors, (1854794), 401143 states have internal predecessors, (1854794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 26.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:31:27,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-09-16 10:31:27,068 INFO L93 Difference]: Finished difference Result 316733 states and 1417617 transitions. [2022-09-16 10:31:27,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-16 10:31:27,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 26.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-09-16 10:31:27,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-09-16 10:31:31,837 INFO L225 Difference]: With dead ends: 316733 [2022-09-16 10:31:31,837 INFO L226 Difference]: Without dead ends: 316733 [2022-09-16 10:31:31,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-16 10:31:31,872 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 66 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-09-16 10:31:31,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 192 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-09-16 10:31:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316733 states. [2022-09-16 10:31:48,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316733 to 316733. [2022-09-16 10:31:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316733 states, 316541 states have (on average 4.478462505646978) internal successors, (1417617), 316732 states have internal predecessors, (1417617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:31:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316733 states to 316733 states and 1417617 transitions. [2022-09-16 10:31:53,497 INFO L78 Accepts]: Start accepts. Automaton has 316733 states and 1417617 transitions. Word has length 52 [2022-09-16 10:31:53,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-09-16 10:31:53,497 INFO L495 AbstractCegarLoop]: Abstraction has 316733 states and 1417617 transitions. [2022-09-16 10:31:53,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 26.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:31:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 316733 states and 1417617 transitions. [2022-09-16 10:31:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-09-16 10:31:53,509 INFO L187 NwaCegarLoop]: Found error trace [2022-09-16 10:31:53,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 10:31:53,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-16 10:31:53,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [P0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, P0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, P1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, P1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-09-16 10:31:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 10:31:53,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2145601678, now seen corresponding path program 1 times [2022-09-16 10:31:53,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 10:31:53,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727334198] [2022-09-16 10:31:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 10:31:53,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 10:31:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 10:31:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 10:31:53,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 10:31:53,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727334198] [2022-09-16 10:31:53,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727334198] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 10:31:53,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 10:31:53,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 10:31:53,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822138102] [2022-09-16 10:31:53,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 10:31:53,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 10:31:53,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 10:31:53,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 10:31:53,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 10:31:53,682 INFO L87 Difference]: Start difference. First operand 316733 states and 1417617 transitions. Second operand has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:31:59,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-09-16 10:31:59,953 INFO L93 Difference]: Finished difference Result 231779 states and 1035310 transitions. [2022-09-16 10:31:59,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-16 10:31:59,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-09-16 10:31:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-09-16 10:32:04,654 INFO L225 Difference]: With dead ends: 231779 [2022-09-16 10:32:04,660 INFO L226 Difference]: Without dead ends: 231779 [2022-09-16 10:32:04,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 10:32:04,666 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 137 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-09-16 10:32:04,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 351 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-09-16 10:32:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231779 states. [2022-09-16 10:32:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231779 to 231779. [2022-09-16 10:32:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231779 states, 231737 states have (on average 4.467607675942987) internal successors, (1035310), 231778 states have internal predecessors, (1035310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:32:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231779 states to 231779 states and 1035310 transitions. [2022-09-16 10:32:23,613 INFO L78 Accepts]: Start accepts. Automaton has 231779 states and 1035310 transitions. Word has length 64 [2022-09-16 10:32:23,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-09-16 10:32:23,614 INFO L495 AbstractCegarLoop]: Abstraction has 231779 states and 1035310 transitions. [2022-09-16 10:32:23,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:32:23,614 INFO L276 IsEmpty]: Start isEmpty. Operand 231779 states and 1035310 transitions. [2022-09-16 10:32:23,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-09-16 10:32:23,616 INFO L187 NwaCegarLoop]: Found error trace [2022-09-16 10:32:23,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 10:32:23,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-16 10:32:23,617 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [P0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, P0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, P1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, P1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-09-16 10:32:23,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 10:32:23,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2145601677, now seen corresponding path program 1 times [2022-09-16 10:32:23,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 10:32:23,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766542201] [2022-09-16 10:32:23,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 10:32:23,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 10:32:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 10:32:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 10:32:23,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 10:32:23,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766542201] [2022-09-16 10:32:23,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766542201] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 10:32:23,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 10:32:23,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 10:32:23,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642366353] [2022-09-16 10:32:23,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 10:32:23,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 10:32:23,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 10:32:23,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 10:32:23,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-09-16 10:32:23,743 INFO L87 Difference]: Start difference. First operand 231779 states and 1035310 transitions. Second operand has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)