/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:42:37,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:42:37,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:42:37,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:42:37,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:42:37,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:42:37,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:42:37,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:42:37,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:42:37,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:42:37,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:42:37,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:42:37,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:42:37,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:42:37,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:42:37,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:42:37,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:42:37,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:42:37,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:42:37,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:42:37,989 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:42:38,004 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:42:38,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:42:38,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:42:38,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:42:38,005 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:42:38,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:42:38,005 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:42:38,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:42:38,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:42:38,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:42:38,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:42:38,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:42:38,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:42:38,006 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:42:38,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:42:38,006 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:42:38,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:42:38,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:42:38,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:42:38,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:42:38,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:42:38,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:42:38,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:42:38,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:42:38,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:42:38,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:42:38,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:42:38,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:42:38,008 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:42:38,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:42:38,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:42:38,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:42:38,250 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:42:38,250 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:42:38,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound20.i [2021-05-02 14:42:38,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b8fd6b9a/7edc4f095f0f4da597b8e38776965949/FLAG9b36eaf7c [2021-05-02 14:42:38,616 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:42:38,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound20.i [2021-05-02 14:42:38,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b8fd6b9a/7edc4f095f0f4da597b8e38776965949/FLAG9b36eaf7c [2021-05-02 14:42:39,038 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b8fd6b9a/7edc4f095f0f4da597b8e38776965949 [2021-05-02 14:42:39,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:42:39,040 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:42:39,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:42:39,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:42:39,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:42:39,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:42:39" (1/1) ... [2021-05-02 14:42:39,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50d70f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:42:39, skipping insertion in model container [2021-05-02 14:42:39,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:42:39" (1/1) ... [2021-05-02 14:42:39,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:42:39,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:42:39,132 WARN L224 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/divbin_valuebound20.i[958,971] [2021-05-02 14:42:39,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:42:39,145 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:42:39,152 WARN L224 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/divbin_valuebound20.i[958,971] [2021-05-02 14:42:39,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:42:39,164 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:42:39,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:42:39 WrapperNode [2021-05-02 14:42:39,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:42:39,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:42:39,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:42:39,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:42:39,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:42:39" (1/1) ... [2021-05-02 14:42:39,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:42:39" (1/1) ... [2021-05-02 14:42:39,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:42:39" (1/1) ... [2021-05-02 14:42:39,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:42:39" (1/1) ... [2021-05-02 14:42:39,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:42:39" (1/1) ... [2021-05-02 14:42:39,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:42:39" (1/1) ... [2021-05-02 14:42:39,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:42:39" (1/1) ... [2021-05-02 14:42:39,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:42:39,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:42:39,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:42:39,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:42:39,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:42:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:42:39,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:42:39,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:42:39,280 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:42:39,280 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:42:39,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:42:39,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:42:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:42:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:42:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 14:42:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 14:42:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:42:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:42:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 14:42:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:42:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:42:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:42:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:42:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:42:39,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:42:39,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:42:39,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:42:39,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:42:39,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:42:39,471 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:42:39,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:42:39 BoogieIcfgContainer [2021-05-02 14:42:39,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:42:39,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:42:39,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:42:39,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:42:39,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:42:39" (1/3) ... [2021-05-02 14:42:39,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28247f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:42:39, skipping insertion in model container [2021-05-02 14:42:39,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:42:39" (2/3) ... [2021-05-02 14:42:39,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28247f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:42:39, skipping insertion in model container [2021-05-02 14:42:39,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:42:39" (3/3) ... [2021-05-02 14:42:39,493 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound20.i [2021-05-02 14:42:39,496 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:42:39,498 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:42:39,508 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:42:39,553 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:42:39,553 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:42:39,553 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:42:39,553 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:42:39,553 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:42:39,554 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:42:39,554 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:42:39,554 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:42:39,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:42:39,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:42:39,570 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:42:39,570 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:42:39,571 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:42:39,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:42:39,576 INFO L82 PathProgramCache]: Analyzing trace with hash 291922115, now seen corresponding path program 1 times [2021-05-02 14:42:39,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:42:39,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804983082] [2021-05-02 14:42:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:42:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:42:39,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:42:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:42:39,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:42:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:42:39,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:42:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:42:39,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:42:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:42:39,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:42:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:42:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:42:39,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:42:39,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804983082] [2021-05-02 14:42:39,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804983082] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:42:39,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:42:39,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:42:39,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239865096] [2021-05-02 14:42:39,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:42:39,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:42:39,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:42:39,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:42:39,820 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:42:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:42:39,904 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2021-05-02 14:42:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:42:39,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 14:42:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:42:39,910 INFO L225 Difference]: With dead ends: 61 [2021-05-02 14:42:39,910 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 14:42:39,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:42:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 14:42:39,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 14:42:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:42:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 14:42:39,940 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-02 14:42:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:42:39,940 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 14:42:39,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:42:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 14:42:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 14:42:39,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:42:39,942 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:42:39,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:42:39,942 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:42:39,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:42:39,942 INFO L82 PathProgramCache]: Analyzing trace with hash -245963777, now seen corresponding path program 1 times [2021-05-02 14:42:39,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:42:39,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587740915] [2021-05-02 14:42:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:42:39,955 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:42:39,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899210315] [2021-05-02 14:42:39,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:42:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:42:40,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:42:40,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:42:40,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:42:40,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:42:40,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587740915] [2021-05-02 14:42:40,284 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:42:40,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899210315] [2021-05-02 14:42:40,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899210315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:42:40,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:42:40,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:42:40,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685900442] [2021-05-02 14:42:40,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:42:40,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:42:40,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:42:40,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:42:40,286 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:42:40,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:42:40,419 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-02 14:42:40,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:42:40,420 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-02 14:42:40,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:42:40,426 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:42:40,426 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 14:42:40,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:42:40,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 14:42:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-02 14:42:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:42:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-02 14:42:40,433 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-02 14:42:40,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:42:40,434 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-02 14:42:40,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:42:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-02 14:42:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 14:42:40,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:42:40,435 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:42:40,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:42:40,641 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:42:40,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:42:40,641 INFO L82 PathProgramCache]: Analyzing trace with hash 397552474, now seen corresponding path program 1 times [2021-05-02 14:42:40,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:42:40,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121548669] [2021-05-02 14:42:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:42:40,655 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:42:40,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008402791] [2021-05-02 14:42:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:42:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:42:40,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:42:40,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:42:40,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:42:40,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:42:40,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121548669] [2021-05-02 14:42:40,892 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:42:40,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008402791] [2021-05-02 14:42:40,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008402791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:42:40,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:42:40,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:42:40,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823039699] [2021-05-02 14:42:40,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:42:40,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:42:40,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:42:40,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:42:40,893 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:42:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:42:41,038 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 14:42:41,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:42:41,038 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-02 14:42:41,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:42:41,039 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:42:41,039 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:42:41,039 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:42:41,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:42:41,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-05-02 14:42:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:42:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 14:42:41,044 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 37 [2021-05-02 14:42:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:42:41,045 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 14:42:41,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:42:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 14:42:41,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:42:41,046 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:42:41,046 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-02 14:42:41,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:42:41,254 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:42:41,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:42:41,255 INFO L82 PathProgramCache]: Analyzing trace with hash -382866049, now seen corresponding path program 1 times [2021-05-02 14:42:41,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:42:41,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235611040] [2021-05-02 14:42:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:42:41,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:42:41,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971587087] [2021-05-02 14:42:41,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:42:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:42:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 14:42:41,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:42:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:42:41,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:42:41,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235611040] [2021-05-02 14:42:41,359 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:42:41,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971587087] [2021-05-02 14:42:41,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971587087] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:42:41,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:42:41,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:42:41,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65893789] [2021-05-02 14:42:41,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:42:41,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:42:41,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:42:41,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:42:41,361 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:42:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:42:41,383 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-05-02 14:42:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:42:41,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-05-02 14:42:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:42:41,386 INFO L225 Difference]: With dead ends: 61 [2021-05-02 14:42:41,386 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 14:42:41,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:42:41,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 14:42:41,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 14:42:41,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:42:41,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-05-02 14:42:41,399 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 43 [2021-05-02 14:42:41,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:42:41,402 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-05-02 14:42:41,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:42:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-05-02 14:42:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 14:42:41,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:42:41,403 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-02 14:42:41,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:42:41,609 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:42:41,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:42:41,609 INFO L82 PathProgramCache]: Analyzing trace with hash 866494938, now seen corresponding path program 1 times [2021-05-02 14:42:41,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:42:41,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793788174] [2021-05-02 14:42:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:42:41,618 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:42:41,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395328840] [2021-05-02 14:42:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:42:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:42:41,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:42:41,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:42:41,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:41,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:41,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:41,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:41,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:41,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:41,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:41,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:42,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:42,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:42,300 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 31 [2021-05-02 14:42:42,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:42,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:42:42,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:42:42,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793788174] [2021-05-02 14:42:42,540 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:42:42,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395328840] [2021-05-02 14:42:42,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395328840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:42:42,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:42:42,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:42:42,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903236306] [2021-05-02 14:42:42,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:42:42,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:42:42,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:42:42,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:42:42,541 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:42:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:42:42,908 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2021-05-02 14:42:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:42:42,908 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2021-05-02 14:42:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:42:42,909 INFO L225 Difference]: With dead ends: 66 [2021-05-02 14:42:42,909 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 14:42:42,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 584.4ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:42:42,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 14:42:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 14:42:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:42:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-05-02 14:42:42,914 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 45 [2021-05-02 14:42:42,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:42:42,914 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-05-02 14:42:42,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:42:42,915 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-05-02 14:42:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 14:42:42,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:42:42,916 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2021-05-02 14:42:43,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:42:43,119 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:42:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:42:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2104666202, now seen corresponding path program 2 times [2021-05-02 14:42:43,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:42:43,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112508460] [2021-05-02 14:42:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:42:43,128 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:42:43,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048680031] [2021-05-02 14:42:43,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:42:43,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:42:43,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:42:43,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:42:43,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:42:43,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:43,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:43,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:43,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:43,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:43,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:43,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:43,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:43,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:43,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:46,155 WARN L205 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 34 [2021-05-02 14:42:46,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:46,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:47,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:15,148 WARN L159 QuantifierPusher]: Ignoring assumption.