/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-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:28:06,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:28:06,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:28:07,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:28:07,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:28:07,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:28:07,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:28:07,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:28:07,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:28:07,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:28:07,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:28:07,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:28:07,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:28:07,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:28:07,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:28:07,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:28:07,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:28:07,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:28:07,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:28:07,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:28:07,038 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 15:28:07,059 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:28:07,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:28:07,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:28:07,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:28:07,060 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:28:07,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:28:07,060 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:28:07,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:28:07,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:28:07,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:28:07,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:28:07,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:28:07,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:28:07,061 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:28:07,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:28:07,061 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:28:07,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:28:07,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:28:07,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:28:07,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:28:07,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:28:07,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:28:07,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:28:07,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:28:07,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:28:07,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:28:07,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:28:07,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:28:07,063 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:28:07,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:28:07,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:28:07,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:28:07,282 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:28:07,282 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:28:07,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound2.c [2021-05-02 15:28:07,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91280b4ab/ae2e817abcf14e9fb2b077b946d9d556/FLAG741890ba2 [2021-05-02 15:28:07,717 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:28:07,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound2.c [2021-05-02 15:28:07,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91280b4ab/ae2e817abcf14e9fb2b077b946d9d556/FLAG741890ba2 [2021-05-02 15:28:07,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91280b4ab/ae2e817abcf14e9fb2b077b946d9d556 [2021-05-02 15:28:07,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:28:07,741 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:28:07,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:28:07,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:28:07,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:28:07,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:28:07" (1/1) ... [2021-05-02 15:28:07,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d0b14ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:07, skipping insertion in model container [2021-05-02 15:28:07,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:28:07" (1/1) ... [2021-05-02 15:28:07,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:28:07,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:28:07,837 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-ll_valuebound2.c[546,559] [2021-05-02 15:28:07,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:28:07,853 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:28:07,860 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-ll_valuebound2.c[546,559] [2021-05-02 15:28:07,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:28:07,872 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:28:07,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:07 WrapperNode [2021-05-02 15:28:07,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:28:07,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:28:07,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:28:07,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:28:07,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:07" (1/1) ... [2021-05-02 15:28:07,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:07" (1/1) ... [2021-05-02 15:28:07,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:07" (1/1) ... [2021-05-02 15:28:07,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:07" (1/1) ... [2021-05-02 15:28:07,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:07" (1/1) ... [2021-05-02 15:28:07,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:07" (1/1) ... [2021-05-02 15:28:07,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:07" (1/1) ... [2021-05-02 15:28:07,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:28:07,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:28:07,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:28:07,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:28:07,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:07" (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 15:28:08,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:28:08,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:28:08,002 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:28:08,002 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:28:08,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:28:08,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:28:08,003 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:28:08,003 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:28:08,004 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:28:08,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:28:08,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:28:08,005 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:28:08,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:28:08,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:28:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:28:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:28:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:28:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:28:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:28:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:28:08,201 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:28:08,201 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:28:08,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:28:08 BoogieIcfgContainer [2021-05-02 15:28:08,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:28:08,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:28:08,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:28:08,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:28:08,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:28:07" (1/3) ... [2021-05-02 15:28:08,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d380bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:28:08, skipping insertion in model container [2021-05-02 15:28:08,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:07" (2/3) ... [2021-05-02 15:28:08,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d380bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:28:08, skipping insertion in model container [2021-05-02 15:28:08,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:28:08" (3/3) ... [2021-05-02 15:28:08,224 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound2.c [2021-05-02 15:28:08,227 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:28:08,229 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:28:08,252 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:28:08,280 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:28:08,280 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:28:08,281 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:28:08,281 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:28:08,281 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:28:08,281 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:28:08,281 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:28:08,281 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:28:08,321 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 15:28:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:28:08,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:08,326 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 15:28:08,326 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-02 15:28:08,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:08,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235112721] [2021-05-02 15:28:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:08,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:28:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:08,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:28:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:08,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:28:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:08,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:28:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:08,571 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 15:28:08,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:08,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235112721] [2021-05-02 15:28:08,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235112721] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:28:08,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:28:08,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:28:08,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569756825] [2021-05-02 15:28:08,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:28:08,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:08,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:28:08,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:28:08,589 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 15:28:08,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:08,718 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-02 15:28:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:28:08,719 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 15:28:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:08,724 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:28:08,724 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:28:08,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:28:08,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:28:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 15:28:08,765 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 15:28:08,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 15:28:08,768 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 15:28:08,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:08,768 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 15:28:08,769 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 15:28:08,769 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 15:28:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:28:08,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:08,770 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 15:28:08,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:28:08,770 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:08,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:08,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-02 15:28:08,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:08,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21638487] [2021-05-02 15:28:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:08,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:28:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:08,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:28:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:08,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:28:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:08,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:28:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:08,924 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 15:28:08,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:08,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21638487] [2021-05-02 15:28:08,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21638487] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:28:08,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:28:08,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:28:08,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011477706] [2021-05-02 15:28:08,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:28:08,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:08,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:28:08,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:28:08,926 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 15:28:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:09,173 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-02 15:28:09,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:28:09,173 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 15:28:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:09,174 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:28:09,174 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 15:28:09,175 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:28:09,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 15:28:09,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 15:28:09,181 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 15:28:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:28:09,182 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 15:28:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:09,182 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:28:09,182 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 15:28:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:28:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:28:09,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:09,183 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 15:28:09,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:28:09,183 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:09,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:09,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-02 15:28:09,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:09,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632943663] [2021-05-02 15:28:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:09,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:28:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:09,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:28:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:09,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:28:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:09,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:28:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:09,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 15:28:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:09,246 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 15:28:09,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:09,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632943663] [2021-05-02 15:28:09,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632943663] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:28:09,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:28:09,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:28:09,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388803995] [2021-05-02 15:28:09,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:28:09,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:09,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:28:09,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:28:09,248 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 15:28:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:09,420 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-02 15:28:09,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:28:09,420 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 15:28:09,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:09,421 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:28:09,421 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:28:09,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:28:09,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:28:09,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 15:28:09,426 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 15:28:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 15:28:09,427 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 15:28:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:09,427 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 15:28:09,427 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 15:28:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 15:28:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:28:09,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:09,428 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 15:28:09,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 15:28:09,428 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-02 15:28:09,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:09,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084789238] [2021-05-02 15:28:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:09,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:09,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356021065] [2021-05-02 15:28:09,436 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 15:28:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:09,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:28:09,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:09,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:09,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:09,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:09,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:09,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:09,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:09,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:09,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 15:28:09,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:09,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084789238] [2021-05-02 15:28:09,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:09,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356021065] [2021-05-02 15:28:09,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356021065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:09,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:09,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:28:09,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032830755] [2021-05-02 15:28:09,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:28:09,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:09,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:28:09,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:28:09,744 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 15:28:09,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:09,911 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-05-02 15:28:09,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:28:09,911 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-05-02 15:28:09,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:09,912 INFO L225 Difference]: With dead ends: 73 [2021-05-02 15:28:09,912 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 15:28:09,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:28:09,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 15:28:09,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 15:28:09,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:28:09,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-05-02 15:28:09,921 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 38 [2021-05-02 15:28:09,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:09,921 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-05-02 15:28:09,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 15:28:09,921 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-05-02 15:28:09,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 15:28:09,922 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:09,922 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 15:28:10,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:10,137 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:10,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:10,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-02 15:28:10,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:10,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471204001] [2021-05-02 15:28:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:10,144 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:10,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183209762] [2021-05-02 15:28:10,145 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 15:28:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:10,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:28:10,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:10,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 15:28:10,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:10,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471204001] [2021-05-02 15:28:10,375 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:10,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183209762] [2021-05-02 15:28:10,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183209762] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:28:10,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:28:10,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 15:28:10,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951914676] [2021-05-02 15:28:10,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:28:10,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:10,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:28:10,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:28:10,376 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:28:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:10,513 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-02 15:28:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:28:10,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 15:28:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:10,514 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:28:10,514 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 15:28:10,514 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:28:10,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 15:28:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 15:28:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:28:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 15:28:10,520 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-02 15:28:10,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:10,521 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 15:28:10,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:28:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 15:28:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:28:10,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:10,522 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 15:28:10,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:10,737 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:10,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-02 15:28:10,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:10,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083398757] [2021-05-02 15:28:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:10,744 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:10,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488777933] [2021-05-02 15:28:10,744 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 15:28:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:10,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 15:28:10,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:10,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:28:10,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:10,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083398757] [2021-05-02 15:28:10,963 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:10,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488777933] [2021-05-02 15:28:10,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488777933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:10,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:10,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:28:10,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779936415] [2021-05-02 15:28:10,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:28:10,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:10,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:28:10,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:28:10,964 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:28:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:11,166 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2021-05-02 15:28:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:28:11,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 15:28:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:11,168 INFO L225 Difference]: With dead ends: 95 [2021-05-02 15:28:11,168 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 15:28:11,169 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:28:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 15:28:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 15:28:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 15:28:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2021-05-02 15:28:11,177 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 55 [2021-05-02 15:28:11,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:11,178 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2021-05-02 15:28:11,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:28:11,178 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2021-05-02 15:28:11,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 15:28:11,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:11,179 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 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 15:28:11,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:11,394 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:11,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:11,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1784683007, now seen corresponding path program 1 times [2021-05-02 15:28:11,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:11,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040339572] [2021-05-02 15:28:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:11,400 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:11,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10346257] [2021-05-02 15:28:11,400 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 15:28:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:11,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 15:28:11,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:11,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 15:28:11,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:11,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040339572] [2021-05-02 15:28:11,736 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:11,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10346257] [2021-05-02 15:28:11,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10346257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:11,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:11,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:28:11,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875532776] [2021-05-02 15:28:11,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:28:11,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:11,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:28:11,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:28:11,737 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:28:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:11,936 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2021-05-02 15:28:11,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:28:11,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-02 15:28:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:11,937 INFO L225 Difference]: With dead ends: 91 [2021-05-02 15:28:11,937 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 15:28:11,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:28:11,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 15:28:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 15:28:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 52 states have internal predecessors, (56), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:28:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-05-02 15:28:11,945 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 62 [2021-05-02 15:28:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:11,946 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-05-02 15:28:11,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:28:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-05-02 15:28:11,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 15:28:11,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:11,946 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 15:28:12,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:12,162 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:12,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:12,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-02 15:28:12,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:12,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817208743] [2021-05-02 15:28:12,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:12,168 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:12,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818810346] [2021-05-02 15:28:12,168 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 15:28:12,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:28:12,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:28:12,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 15:28:12,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:12,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:12,569 WARN L159 QuantifierPusher]: Ignoring assumption.