/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/nla-digbench-scaling/dijkstra-u_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 06:55:29,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 06:55:29,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 06:55:29,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 06:55:29,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 06:55:29,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 06:55:29,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 06:55:29,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 06:55:29,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 06:55:29,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 06:55:29,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 06:55:29,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 06:55:29,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 06:55:29,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 06:55:29,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 06:55:29,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 06:55:29,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 06:55:29,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 06:55:29,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 06:55:29,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 06:55:29,737 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 06:55:29,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 06:55:29,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 06:55:29,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 06:55:29,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 06:55:29,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 06:55:29,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 06:55:29,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 06:55:29,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 06:55:29,755 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 06:55:29,782 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 06:55:29,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 06:55:29,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 06:55:29,783 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 06:55:29,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 06:55:29,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 06:55:29,784 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 06:55:29,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 06:55:29,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 06:55:29,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 06:55:29,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 06:55:29,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 06:55:29,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 06:55:29,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 06:55:29,786 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 06:55:29,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 06:55:29,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 06:55:29,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 06:55:29,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 06:55:29,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 06:55:29,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 06:55:29,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 06:55:29,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 06:55:29,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 06:55:29,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 06:55:29,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 06:55:29,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 06:55:29,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 06:55:29,789 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 06:55:29,789 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 06:55:30,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 06:55:30,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 06:55:30,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 06:55:30,033 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 06:55:30,034 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 06:55:30,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c [2022-04-05 06:55:30,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c28efc7ee/537b2cecd0e64f2bb497605fd49545c5/FLAG2499b4052 [2022-04-05 06:55:30,406 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 06:55:30,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c [2022-04-05 06:55:30,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c28efc7ee/537b2cecd0e64f2bb497605fd49545c5/FLAG2499b4052 [2022-04-05 06:55:30,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c28efc7ee/537b2cecd0e64f2bb497605fd49545c5 [2022-04-05 06:55:30,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 06:55:30,835 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 06:55:30,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 06:55:30,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 06:55:30,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 06:55:30,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 06:55:30" (1/1) ... [2022-04-05 06:55:30,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fbc1390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:55:30, skipping insertion in model container [2022-04-05 06:55:30,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 06:55:30" (1/1) ... [2022-04-05 06:55:30,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 06:55:30,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 06:55:31,023 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c[525,538] [2022-04-05 06:55:31,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 06:55:31,076 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 06:55:31,089 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c[525,538] [2022-04-05 06:55:31,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 06:55:31,115 INFO L208 MainTranslator]: Completed translation [2022-04-05 06:55:31,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:55:31 WrapperNode [2022-04-05 06:55:31,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 06:55:31,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 06:55:31,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 06:55:31,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 06:55:31,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:55:31" (1/1) ... [2022-04-05 06:55:31,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:55:31" (1/1) ... [2022-04-05 06:55:31,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:55:31" (1/1) ... [2022-04-05 06:55:31,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:55:31" (1/1) ... [2022-04-05 06:55:31,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:55:31" (1/1) ... [2022-04-05 06:55:31,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:55:31" (1/1) ... [2022-04-05 06:55:31,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:55:31" (1/1) ... [2022-04-05 06:55:31,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 06:55:31,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 06:55:31,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 06:55:31,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 06:55:31,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:55:31" (1/1) ... [2022-04-05 06:55:31,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 06:55:31,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:55:31,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 06:55:31,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 06:55:31,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 06:55:31,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 06:55:31,212 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 06:55:31,212 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 06:55:31,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 06:55:31,213 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 06:55:31,213 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 06:55:31,214 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 06:55:31,215 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 06:55:31,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 06:55:31,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 06:55:31,215 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 06:55:31,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 06:55:31,216 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 06:55:31,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 06:55:31,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 06:55:31,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 06:55:31,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 06:55:31,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 06:55:31,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 06:55:31,271 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 06:55:31,272 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 06:55:31,416 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 06:55:31,421 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 06:55:31,422 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 06:55:31,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:55:31 BoogieIcfgContainer [2022-04-05 06:55:31,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 06:55:31,424 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 06:55:31,424 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 06:55:31,425 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 06:55:31,427 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:55:31" (1/1) ... [2022-04-05 06:55:31,429 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 06:55:31,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 06:55:31 BasicIcfg [2022-04-05 06:55:31,457 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 06:55:31,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 06:55:31,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 06:55:31,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 06:55:31,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 06:55:30" (1/4) ... [2022-04-05 06:55:31,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc9c0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 06:55:31, skipping insertion in model container [2022-04-05 06:55:31,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:55:31" (2/4) ... [2022-04-05 06:55:31,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc9c0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 06:55:31, skipping insertion in model container [2022-04-05 06:55:31,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:55:31" (3/4) ... [2022-04-05 06:55:31,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc9c0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 06:55:31, skipping insertion in model container [2022-04-05 06:55:31,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 06:55:31" (4/4) ... [2022-04-05 06:55:31,464 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound100.cqvasr [2022-04-05 06:55:31,468 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 06:55:31,468 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 06:55:31,506 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 06:55:31,512 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 [2022-04-05 06:55:31,513 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 06:55:31,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 06:55:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 06:55:31,530 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:55:31,531 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:55:31,531 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:55:31,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:55:31,535 INFO L85 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2022-04-05 06:55:31,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:55:31,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772291088] [2022-04-05 06:55:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:55:31,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:55:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:55:31,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:55:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:55:31,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 06:55:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:55:31,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 06:55:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:55:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:55:31,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:55:31,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772291088] [2022-04-05 06:55:31,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772291088] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:55:31,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:55:31,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 06:55:31,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021282975] [2022-04-05 06:55:31,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:55:31,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 06:55:31,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:55:31,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 06:55:31,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 06:55:31,801 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:55:33,884 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 06:55:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:55:34,034 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2022-04-05 06:55:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 06:55:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-05 06:55:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:55:34,043 INFO L225 Difference]: With dead ends: 69 [2022-04-05 06:55:34,044 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 06:55:34,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 06:55:34,049 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:55:34,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-04-05 06:55:34,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 06:55:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-05 06:55:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 06:55:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-04-05 06:55:34,078 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-04-05 06:55:34,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:55:34,079 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-04-05 06:55:34,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:55:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-04-05 06:55:34,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 06:55:34,081 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:55:34,081 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:55:34,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 06:55:34,081 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:55:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:55:34,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2022-04-05 06:55:34,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:55:34,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696399464] [2022-04-05 06:55:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:55:34,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:55:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:55:34,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:55:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:55:34,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 06:55:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:55:34,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 06:55:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:55:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:55:34,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:55:34,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696399464] [2022-04-05 06:55:34,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696399464] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:55:34,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:55:34,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-05 06:55:34,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571650359] [2022-04-05 06:55:34,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:55:34,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 06:55:34,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:55:34,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 06:55:34,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-05 06:55:34,392 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:55:40,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 6.33s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 06:55:46,419 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.46s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 06:55:51,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 06:55:52,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:55:52,607 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2022-04-05 06:55:52,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 06:55:52,610 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-04-05 06:55:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:55:52,611 INFO L225 Difference]: With dead ends: 68 [2022-04-05 06:55:52,611 INFO L226 Difference]: Without dead ends: 48 [2022-04-05 06:55:52,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-05 06:55:52,613 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 52 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:55:52,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 53 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 197 Invalid, 3 Unknown, 0 Unchecked, 18.1s Time] [2022-04-05 06:55:52,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-05 06:55:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-05 06:55:52,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 06:55:52,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-04-05 06:55:52,631 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2022-04-05 06:55:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:55:52,631 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-04-05 06:55:52,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:55:52,632 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-04-05 06:55:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 06:55:52,633 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:55:52,633 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:55:52,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 06:55:52,633 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:55:52,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:55:52,634 INFO L85 PathProgramCache]: Analyzing trace with hash -472493455, now seen corresponding path program 1 times [2022-04-05 06:55:52,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:55:52,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540023992] [2022-04-05 06:55:52,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:55:52,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:55:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:55:52,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:55:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:55:52,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 06:55:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:55:52,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 06:55:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:55:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:55:52,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:55:52,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540023992] [2022-04-05 06:55:52,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540023992] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:55:52,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:55:52,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-05 06:55:52,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187831836] [2022-04-05 06:55:52,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:55:52,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 06:55:52,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:55:52,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 06:55:52,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-05 06:55:52,837 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:55:56,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 06:55:58,256 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 06:56:00,042 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 06:56:02,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 06:56:05,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 06:56:06,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:56:06,377 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2022-04-05 06:56:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 06:56:06,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-04-05 06:56:06,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:56:06,380 INFO L225 Difference]: With dead ends: 64 [2022-04-05 06:56:06,380 INFO L226 Difference]: Without dead ends: 62 [2022-04-05 06:56:06,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-05 06:56:06,381 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 33 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 44 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:56:06,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 53 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 190 Invalid, 3 Unknown, 0 Unchecked, 13.5s Time] [2022-04-05 06:56:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-05 06:56:06,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-04-05 06:56:06,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 30 states have internal predecessors, (32), 26 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-05 06:56:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2022-04-05 06:56:06,399 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 26 [2022-04-05 06:56:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:56:06,399 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2022-04-05 06:56:06,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:56:06,399 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2022-04-05 06:56:06,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 06:56:06,400 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:56:06,400 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:56:06,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 06:56:06,401 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:56:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:56:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1385093780, now seen corresponding path program 1 times [2022-04-05 06:56:06,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:56:06,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444646344] [2022-04-05 06:56:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:56:06,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:56:06,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:56:06,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298169119] [2022-04-05 06:56:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:56:06,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:56:06,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:56:06,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:56:06,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 06:56:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:56:06,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 06:56:06,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:56:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 06:56:06,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 06:56:06,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:56:06,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444646344] [2022-04-05 06:56:06,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:56:06,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298169119] [2022-04-05 06:56:06,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298169119] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:56:06,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:56:06,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 06:56:06,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586812922] [2022-04-05 06:56:06,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:56:06,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 06:56:06,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:56:06,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 06:56:06,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:56:06,674 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 06:56:07,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:56:07,486 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-04-05 06:56:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 06:56:07,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-05 06:56:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:56:07,488 INFO L225 Difference]: With dead ends: 69 [2022-04-05 06:56:07,488 INFO L226 Difference]: Without dead ends: 46 [2022-04-05 06:56:07,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:56:07,490 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-05 06:56:07,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-05 06:56:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-05 06:56:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-05 06:56:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 06:56:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2022-04-05 06:56:07,500 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 34 [2022-04-05 06:56:07,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:56:07,500 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2022-04-05 06:56:07,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 06:56:07,501 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2022-04-05 06:56:07,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 06:56:07,502 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:56:07,502 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:56:07,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 06:56:07,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:56:07,707 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:56:07,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:56:07,708 INFO L85 PathProgramCache]: Analyzing trace with hash 419889614, now seen corresponding path program 1 times [2022-04-05 06:56:07,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:56:07,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499504325] [2022-04-05 06:56:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:56:07,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:56:07,718 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:56:07,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518441600] [2022-04-05 06:56:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:56:07,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:56:07,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:56:07,720 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:56:07,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 06:56:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:56:07,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 06:56:07,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:56:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-05 06:56:07,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 06:56:07,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:56:07,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499504325] [2022-04-05 06:56:07,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:56:07,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518441600] [2022-04-05 06:56:07,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518441600] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:56:07,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:56:07,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 06:56:07,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219367573] [2022-04-05 06:56:07,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:56:07,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 06:56:07,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:56:07,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 06:56:07,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:56:07,880 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 06:56:10,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 06:56:10,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:56:10,261 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2022-04-05 06:56:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 06:56:10,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-05 06:56:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:56:10,264 INFO L225 Difference]: With dead ends: 60 [2022-04-05 06:56:10,264 INFO L226 Difference]: Without dead ends: 57 [2022-04-05 06:56:10,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:56:10,265 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:56:10,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 151 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-05 06:56:10,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-05 06:56:10,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-05 06:56:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-05 06:56:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2022-04-05 06:56:10,276 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 36 [2022-04-05 06:56:10,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:56:10,276 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2022-04-05 06:56:10,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 06:56:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2022-04-05 06:56:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 06:56:10,278 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:56:10,278 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:56:10,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-05 06:56:10,478 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:56:10,479 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:56:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:56:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1513839050, now seen corresponding path program 1 times [2022-04-05 06:56:10,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:56:10,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736972935] [2022-04-05 06:56:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:56:10,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:56:10,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:56:10,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111329984] [2022-04-05 06:56:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:56:10,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:56:10,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:56:10,496 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:56:10,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process