/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/hard-u_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:32:36,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:32:36,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:32:36,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:32:36,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:32:36,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:32:36,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:32:36,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:32:36,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:32:36,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:32:36,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:32:36,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:32:36,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:32:36,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:32:36,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:32:36,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:32:36,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:32:36,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:32:36,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:32:36,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:32:36,959 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 15:32:36,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:32:37,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:32:37,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:32:37,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:32:37,006 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:32:37,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:32:37,007 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:32:37,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:32:37,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:32:37,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:32:37,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:32:37,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:32:37,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:32:37,008 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:32:37,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:32:37,008 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:32:37,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:32:37,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:32:37,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:32:37,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:32:37,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:32:37,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:32:37,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:32:37,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:32:37,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:32:37,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:32:37,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:32:37,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:32:37,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:32:37,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:32:37,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:32:37,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:32:37,366 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:32:37,366 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:32:37,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound100.c [2021-05-02 15:32:37,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e49fa62e4/3b16f789cafc481fb6cc8e6ac798aedb/FLAG52ce77df2 [2021-05-02 15:32:37,941 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:32:37,941 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound100.c [2021-05-02 15:32:37,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e49fa62e4/3b16f789cafc481fb6cc8e6ac798aedb/FLAG52ce77df2 [2021-05-02 15:32:38,341 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e49fa62e4/3b16f789cafc481fb6cc8e6ac798aedb [2021-05-02 15:32:38,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:32:38,348 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:32:38,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:32:38,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:32:38,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:32:38,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:32:38" (1/1) ... [2021-05-02 15:32:38,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9285e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:38, skipping insertion in model container [2021-05-02 15:32:38,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:32:38" (1/1) ... [2021-05-02 15:32:38,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:32:38,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:32:38,523 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/hard-u_valuebound100.c[545,558] [2021-05-02 15:32:38,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:32:38,547 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:32:38,572 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/hard-u_valuebound100.c[545,558] [2021-05-02 15:32:38,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:32:38,602 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:32:38,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:38 WrapperNode [2021-05-02 15:32:38,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:32:38,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:32:38,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:32:38,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:32:38,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:38" (1/1) ... [2021-05-02 15:32:38,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:38" (1/1) ... [2021-05-02 15:32:38,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:38" (1/1) ... [2021-05-02 15:32:38,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:38" (1/1) ... [2021-05-02 15:32:38,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:38" (1/1) ... [2021-05-02 15:32:38,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:38" (1/1) ... [2021-05-02 15:32:38,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:38" (1/1) ... [2021-05-02 15:32:38,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:32:38,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:32:38,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:32:38,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:32:38,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:38" (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 15:32:38,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:32:38,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:32:38,710 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:32:38,710 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:32:38,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:32:38,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:32:38,711 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:32:38,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:32:38,712 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:32:38,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:32:38,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:32:38,712 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:32:38,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:32:38,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:32:38,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:32:38,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:32:38,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:32:38,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:32:38,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:32:38,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:32:39,077 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:32:39,077 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:32:39,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:32:39 BoogieIcfgContainer [2021-05-02 15:32:39,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:32:39,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:32:39,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:32:39,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:32:39,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:32:38" (1/3) ... [2021-05-02 15:32:39,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c14d2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:32:39, skipping insertion in model container [2021-05-02 15:32:39,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:38" (2/3) ... [2021-05-02 15:32:39,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c14d2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:32:39, skipping insertion in model container [2021-05-02 15:32:39,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:32:39" (3/3) ... [2021-05-02 15:32:39,086 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound100.c [2021-05-02 15:32:39,091 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:32:39,097 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:32:39,113 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:32:39,142 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:32:39,142 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:32:39,142 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:32:39,142 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:32:39,142 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:32:39,142 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:32:39,142 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:32:39,143 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:32:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 15:32:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:32:39,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:39,174 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:32:39,175 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:39,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:39,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-02 15:32:39,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:39,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630602632] [2021-05-02 15:32:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:39,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:32:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:39,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:32:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:39,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:32:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:39,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:32:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:32:39,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:39,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630602632] [2021-05-02 15:32:39,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630602632] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:32:39,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:32:39,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:32:39,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316107900] [2021-05-02 15:32:39,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:32:39,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:39,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:32:39,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:32:39,550 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:32:39,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:32:39,806 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-02 15:32:39,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:32:39,808 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 15:32:39,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:32:39,814 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:32:39,814 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:32:39,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:32:39,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:32:39,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 15:32:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:32:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 15:32:39,873 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 15:32:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:32:39,873 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 15:32:39,873 INFO L481 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:32:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 15:32:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:32:39,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:39,875 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:32:39,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:32:39,876 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:39,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:39,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-02 15:32:39,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:39,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796236445] [2021-05-02 15:32:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:40,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:32:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:40,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:32:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:40,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:32:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:40,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:32:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:32:40,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:40,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796236445] [2021-05-02 15:32:40,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796236445] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:32:40,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:32:40,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:32:40,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245401934] [2021-05-02 15:32:40,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:32:40,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:32:40,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:32:40,047 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 15:32:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:32:40,405 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-02 15:32:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:32:40,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-02 15:32:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:32:40,410 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:32:40,410 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 15:32:40,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:32:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 15:32:40,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 15:32:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:32:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:32:40,442 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 15:32:40,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:32:40,445 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:32:40,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 15:32:40,445 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:32:40,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:32:40,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:40,446 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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 15:32:40,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:32:40,447 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:40,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-02 15:32:40,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:40,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582898984] [2021-05-02 15:32:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:40,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:32:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:40,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:32:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:40,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:32:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:40,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:32:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:40,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 15:32:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:32:40,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:40,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582898984] [2021-05-02 15:32:40,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582898984] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:32:40,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:32:40,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:32:40,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117165195] [2021-05-02 15:32:40,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:32:40,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:40,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:32:40,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:32:40,677 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:32:40,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:32:40,984 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-02 15:32:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:32:40,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 33 [2021-05-02 15:32:40,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:32:40,986 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:32:40,986 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:32:40,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:32:40,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:32:40,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 15:32:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:32:40,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 15:32:40,995 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 15:32:40,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:32:40,996 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 15:32:40,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:32:40,996 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 15:32:40,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:32:40,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:40,997 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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 15:32:40,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 15:32:40,998 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:40,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:40,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-02 15:32:40,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:40,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492560046] [2021-05-02 15:32:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:41,011 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:32:41,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940510048] [2021-05-02 15:32:41,011 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 15:32:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:41,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 15:32:41,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:32:41,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:41,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:41,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:41,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:41,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:41,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:41,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 15:32:41,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:41,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492560046] [2021-05-02 15:32:41,400 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:32:41,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940510048] [2021-05-02 15:32:41,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940510048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:32:41,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:32:41,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:32:41,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862834964] [2021-05-02 15:32:41,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:32:41,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:41,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:32:41,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:32:41,402 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:32:41,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:32:41,587 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-05-02 15:32:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:32:41,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-02 15:32:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:32:41,590 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:32:41,590 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 15:32:41,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:32:41,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 15:32:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 15:32:41,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:32:41,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 15:32:41,618 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-02 15:32:41,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:32:41,619 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 15:32:41,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:32:41,619 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 15:32:41,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 15:32:41,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:41,622 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-05-02 15:32:41,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:32:41,845 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:41,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:41,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-02 15:32:41,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:41,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445070741] [2021-05-02 15:32:41,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:41,856 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:32:41,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499045182] [2021-05-02 15:32:41,856 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 15:32:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:41,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:32:41,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:32:41,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:41,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 15:32:42,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:42,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445070741] [2021-05-02 15:32:42,130 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:32:42,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499045182] [2021-05-02 15:32:42,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499045182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:32:42,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:32:42,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:32:42,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119330461] [2021-05-02 15:32:42,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:32:42,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:42,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:32:42,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:32:42,132 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:32:42,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:32:42,256 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-05-02 15:32:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:32:42,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 15:32:42,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:32:42,257 INFO L225 Difference]: With dead ends: 68 [2021-05-02 15:32:42,257 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 15:32:42,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:32:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 15:32:42,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-02 15:32:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 15:32:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-05-02 15:32:42,268 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 45 [2021-05-02 15:32:42,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:32:42,269 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-05-02 15:32:42,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:32:42,269 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-05-02 15:32:42,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:32:42,270 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:42,270 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2021-05-02 15:32:42,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:32:42,471 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:42,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:42,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-02 15:32:42,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:42,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000127029] [2021-05-02 15:32:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:42,481 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:32:42,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707559566] [2021-05-02 15:32:42,481 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 15:32:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:42,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 15:32:42,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:32:42,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:42,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:32:43,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:43,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000127029] [2021-05-02 15:32:43,013 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:32:43,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707559566] [2021-05-02 15:32:43,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707559566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:32:43,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:32:43,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:32:43,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558267173] [2021-05-02 15:32:43,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:32:43,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:43,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:32:43,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:32:43,015 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:32:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:32:43,305 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2021-05-02 15:32:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:32:43,306 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-02 15:32:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:32:43,308 INFO L225 Difference]: With dead ends: 85 [2021-05-02 15:32:43,308 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 15:32:43,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:32:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 15:32:43,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 15:32:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 states have internal predecessors, (48), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 15:32:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2021-05-02 15:32:43,322 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 55 [2021-05-02 15:32:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:32:43,322 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2021-05-02 15:32:43,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:32:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2021-05-02 15:32:43,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 15:32:43,324 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:43,324 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:32:43,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:32:43,531 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:43,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:43,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-02 15:32:43,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:43,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943006446] [2021-05-02 15:32:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:43,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:32:43,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742640632] [2021-05-02 15:32:43,541 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 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 15:32:43,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:32:43,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:32:43,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 15:32:43,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:32:43,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:43,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:44,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:44,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:44,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:44,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:44,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:44,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:44,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:44,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:44,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:46,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:46,173 WARN L159 QuantifierPusher]: Ignoring assumption.