/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/divbin2_valuebound100.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:34:44,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:34:44,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:34:44,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:34:44,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:34:44,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:34:44,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:34:44,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:34:44,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:34:44,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:34:44,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:34:44,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:34:44,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:34:44,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:34:44,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:34:44,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:34:44,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:34:44,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:34:44,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:34:44,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:34:44,170 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:34:44,207 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:34:44,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:34:44,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:34:44,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:34:44,210 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:34:44,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:34:44,222 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:34:44,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:34:44,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:34:44,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:34:44,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:34:44,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:34:44,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:34:44,225 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:34:44,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:34:44,225 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:34:44,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:34:44,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:34:44,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:34:44,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:34:44,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:34:44,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:34:44,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:34:44,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:34:44,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:34:44,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:34:44,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:34:44,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:34:44,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:34:44,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:34:44,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:34:44,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:34:44,532 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:34:44,533 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:34:44,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound100.i [2021-05-02 14:34:44,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbb23bc4/84e85b9a129f45c3b3ab8daedc651629/FLAGec8f5e256 [2021-05-02 14:34:45,007 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:34:45,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound100.i [2021-05-02 14:34:45,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbb23bc4/84e85b9a129f45c3b3ab8daedc651629/FLAGec8f5e256 [2021-05-02 14:34:45,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbb23bc4/84e85b9a129f45c3b3ab8daedc651629 [2021-05-02 14:34:45,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:34:45,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:34:45,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:34:45,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:34:45,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:34:45,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:34:45" (1/1) ... [2021-05-02 14:34:45,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@343804be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:34:45, skipping insertion in model container [2021-05-02 14:34:45,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:34:45" (1/1) ... [2021-05-02 14:34:45,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:34:45,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:34:45,227 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/divbin2_valuebound100.i[959,972] [2021-05-02 14:34:45,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:34:45,251 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:34:45,315 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/divbin2_valuebound100.i[959,972] [2021-05-02 14:34:45,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:34:45,344 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:34:45,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:34:45 WrapperNode [2021-05-02 14:34:45,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:34:45,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:34:45,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:34:45,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:34:45,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:34:45" (1/1) ... [2021-05-02 14:34:45,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:34:45" (1/1) ... [2021-05-02 14:34:45,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:34:45" (1/1) ... [2021-05-02 14:34:45,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:34:45" (1/1) ... [2021-05-02 14:34:45,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:34:45" (1/1) ... [2021-05-02 14:34:45,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:34:45" (1/1) ... [2021-05-02 14:34:45,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:34:45" (1/1) ... [2021-05-02 14:34:45,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:34:45,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:34:45,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:34:45,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:34:45,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:34:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:34:45,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:34:45,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:34:45,455 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:34:45,456 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:34:45,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:34:45,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:34:45,456 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:34:45,457 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:34:45,457 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 14:34:45,457 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 14:34:45,457 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:34:45,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:34:45,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 14:34:45,458 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:34:45,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:34:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:34:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:34:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:34:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:34:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:34:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:34:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:34:45,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:34:45,721 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:34:45,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:34:45 BoogieIcfgContainer [2021-05-02 14:34:45,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:34:45,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:34:45,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:34:45,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:34:45,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:34:45" (1/3) ... [2021-05-02 14:34:45,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e6c832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:34:45, skipping insertion in model container [2021-05-02 14:34:45,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:34:45" (2/3) ... [2021-05-02 14:34:45,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e6c832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:34:45, skipping insertion in model container [2021-05-02 14:34:45,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:34:45" (3/3) ... [2021-05-02 14:34:45,752 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound100.i [2021-05-02 14:34:45,757 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:34:45,760 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:34:45,774 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:34:45,792 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:34:45,792 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:34:45,792 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:34:45,793 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:34:45,793 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:34:45,793 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:34:45,793 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:34:45,793 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:34:45,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:34:45,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:34:45,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:34:45,813 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:34:45,813 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:34:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:34:45,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1171333446, now seen corresponding path program 1 times [2021-05-02 14:34:45,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:34:45,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405873377] [2021-05-02 14:34:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:34:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:34:46,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:34:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:34:46,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:34:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:34:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:34:46,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:34:46,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405873377] [2021-05-02 14:34:46,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405873377] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:34:46,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:34:46,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:34:46,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218301390] [2021-05-02 14:34:46,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:34:46,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:34:46,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:34:46,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:34:46,087 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:34:46,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:34:46,158 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2021-05-02 14:34:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:34:46,160 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 14:34:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:34:46,166 INFO L225 Difference]: With dead ends: 51 [2021-05-02 14:34:46,166 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 14:34:46,168 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:34:46,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 14:34:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 14:34:46,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 14:34:46,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 14:34:46,198 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-05-02 14:34:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:34:46,199 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 14:34:46,199 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:34:46,199 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 14:34:46,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 14:34:46,200 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:34:46,200 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:34:46,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:34:46,200 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:34:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:34:46,201 INFO L82 PathProgramCache]: Analyzing trace with hash -73515422, now seen corresponding path program 1 times [2021-05-02 14:34:46,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:34:46,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702600323] [2021-05-02 14:34:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:34:46,215 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:34:46,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131195702] [2021-05-02 14:34:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:34:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:34:46,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 14:34:46,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:34:46,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:46,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:34:46,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:34:46,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702600323] [2021-05-02 14:34:46,534 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:34:46,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131195702] [2021-05-02 14:34:46,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131195702] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:34:46,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:34:46,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:34:46,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576611977] [2021-05-02 14:34:46,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:34:46,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:34:46,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:34:46,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:34:46,537 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:34:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:34:46,645 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-02 14:34:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:34:46,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-05-02 14:34:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:34:46,647 INFO L225 Difference]: With dead ends: 37 [2021-05-02 14:34:46,647 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 14:34:46,648 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:34:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 14:34:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 14:34:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 14:34:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-02 14:34:46,655 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2021-05-02 14:34:46,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:34:46,655 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-02 14:34:46,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:34:46,656 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-02 14:34:46,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 14:34:46,656 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:34:46,657 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:34:46,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:34:46,858 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:34:46,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:34:46,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1211706883, now seen corresponding path program 1 times [2021-05-02 14:34:46,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:34:46,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166611217] [2021-05-02 14:34:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:34:46,871 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:34:46,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150784606] [2021-05-02 14:34:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:34:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:34:46,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 14:34:46,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:34:47,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:47,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:34:47,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:34:47,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166611217] [2021-05-02 14:34:47,076 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:34:47,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150784606] [2021-05-02 14:34:47,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150784606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:34:47,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:34:47,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:34:47,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911103164] [2021-05-02 14:34:47,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:34:47,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:34:47,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:34:47,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:34:47,079 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:34:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:34:47,210 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-05-02 14:34:47,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:34:47,210 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-05-02 14:34:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:34:47,211 INFO L225 Difference]: With dead ends: 45 [2021-05-02 14:34:47,211 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 14:34:47,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:34:47,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 14:34:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 14:34:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:34:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-02 14:34:47,220 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-05-02 14:34:47,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:34:47,221 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-02 14:34:47,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:34:47,221 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-02 14:34:47,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 14:34:47,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:34:47,222 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:34:47,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:34:47,437 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:34:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:34:47,437 INFO L82 PathProgramCache]: Analyzing trace with hash 947727214, now seen corresponding path program 1 times [2021-05-02 14:34:47,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:34:47,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638521042] [2021-05-02 14:34:47,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:34:47,454 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:34:47,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000393405] [2021-05-02 14:34:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:34:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:34:47,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:34:47,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:34:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:34:47,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:34:47,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638521042] [2021-05-02 14:34:47,587 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:34:47,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000393405] [2021-05-02 14:34:47,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000393405] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:34:47,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:34:47,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:34:47,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891857189] [2021-05-02 14:34:47,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:34:47,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:34:47,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:34:47,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:34:47,589 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:34:47,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:34:47,612 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-05-02 14:34:47,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:34:47,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 14:34:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:34:47,613 INFO L225 Difference]: With dead ends: 53 [2021-05-02 14:34:47,613 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:34:47,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:34:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:34:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:34:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 14:34:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 14:34:47,620 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2021-05-02 14:34:47,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:34:47,620 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 14:34:47,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:34:47,620 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 14:34:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 14:34:47,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:34:47,626 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:34:47,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:34:47,843 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:34:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:34:47,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1574040585, now seen corresponding path program 1 times [2021-05-02 14:34:47,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:34:47,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752008168] [2021-05-02 14:34:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:34:47,861 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:34:47,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94536182] [2021-05-02 14:34:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:34:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:34:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 14:34:47,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:34:47,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:48,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:48,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:48,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:34:48,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:34:48,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752008168] [2021-05-02 14:34:48,065 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:34:48,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94536182] [2021-05-02 14:34:48,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94536182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:34:48,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:34:48,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:34:48,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606090446] [2021-05-02 14:34:48,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:34:48,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:34:48,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:34:48,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:34:48,067 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:34:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:34:48,212 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-05-02 14:34:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:34:48,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 14:34:48,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:34:48,216 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:34:48,217 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 14:34:48,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:34:48,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 14:34:48,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 14:34:48,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:34:48,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 14:34:48,226 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 29 [2021-05-02 14:34:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:34:48,226 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 14:34:48,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:34:48,226 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 14:34:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 14:34:48,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:34:48,227 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:34:48,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:34:48,441 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:34:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:34:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2129198620, now seen corresponding path program 2 times [2021-05-02 14:34:48,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:34:48,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866344859] [2021-05-02 14:34:48,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:34:48,465 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:34:48,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068820895] [2021-05-02 14:34:48,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:34:48,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:34:48,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:34:48,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:34:48,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:34:48,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:48,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:48,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:48,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:48,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:48,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:34:48,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:34:48,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866344859] [2021-05-02 14:34:48,753 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:34:48,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068820895] [2021-05-02 14:34:48,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068820895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:34:48,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:34:48,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:34:48,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731653857] [2021-05-02 14:34:48,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:34:48,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:34:48,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:34:48,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:34:48,754 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:34:49,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:34:49,022 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2021-05-02 14:34:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:34:49,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-02 14:34:49,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:34:49,024 INFO L225 Difference]: With dead ends: 85 [2021-05-02 14:34:49,024 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 14:34:49,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:34:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 14:34:49,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2021-05-02 14:34:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:34:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 14:34:49,033 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 31 [2021-05-02 14:34:49,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:34:49,034 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 14:34:49,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:34:49,034 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 14:34:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:34:49,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:34:49,035 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:34:49,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:34:49,249 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:34:49,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:34:49,250 INFO L82 PathProgramCache]: Analyzing trace with hash -414186241, now seen corresponding path program 3 times [2021-05-02 14:34:49,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:34:49,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068505918] [2021-05-02 14:34:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:34:49,261 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:34:49,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587871504] [2021-05-02 14:34:49,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:34:49,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 14:34:49,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:34:49,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 14:34:49,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:34:49,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:49,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:49,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:49,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:49,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:49,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:49,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:49,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:34:49,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:34:49,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068505918] [2021-05-02 14:34:49,547 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:34:49,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587871504] [2021-05-02 14:34:49,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587871504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:34:49,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:34:49,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:34:49,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962035223] [2021-05-02 14:34:49,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:34:49,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:34:49,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:34:49,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:34:49,549 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:34:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:34:49,691 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-05-02 14:34:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:34:49,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2021-05-02 14:34:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:34:49,694 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:34:49,694 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 14:34:49,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:34:49,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 14:34:49,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-05-02 14:34:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:34:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-05-02 14:34:49,715 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2021-05-02 14:34:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:34:49,715 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-05-02 14:34:49,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:34:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-05-02 14:34:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 14:34:49,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:34:49,717 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 14:34:49,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:34:49,925 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:34:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:34:49,926 INFO L82 PathProgramCache]: Analyzing trace with hash -758101483, now seen corresponding path program 4 times [2021-05-02 14:34:49,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:34:49,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345698401] [2021-05-02 14:34:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:34:49,934 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:34:49,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600848382] [2021-05-02 14:34:49,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:34:50,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:34:50,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:34:50,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:34:50,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:34:50,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:50,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:50,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:50,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:50,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:50,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:50,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:50,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:34:50,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:34:50,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345698401] [2021-05-02 14:34:50,374 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:34:50,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600848382] [2021-05-02 14:34:50,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600848382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:34:50,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:34:50,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:34:50,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344772220] [2021-05-02 14:34:50,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:34:50,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:34:50,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:34:50,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:34:50,380 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:34:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:34:50,520 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-05-02 14:34:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:34:50,521 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2021-05-02 14:34:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:34:50,522 INFO L225 Difference]: With dead ends: 77 [2021-05-02 14:34:50,522 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 14:34:50,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 219.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:34:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 14:34:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 14:34:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:34:50,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-05-02 14:34:50,527 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2021-05-02 14:34:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:34:50,528 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-05-02 14:34:50,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:34:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-05-02 14:34:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 14:34:50,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:34:50,529 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:34:50,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:34:50,751 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:34:50,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:34:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash 826494192, now seen corresponding path program 5 times [2021-05-02 14:34:50,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:34:50,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278350972] [2021-05-02 14:34:50,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:34:50,761 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:34:50,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428378823] [2021-05-02 14:34:50,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:34:50,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-02 14:34:50,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:34:50,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 14:34:50,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:34:51,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:51,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:51,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:51,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:51,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:51,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:34:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:34:51,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:34:51,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278350972] [2021-05-02 14:34:51,400 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:34:51,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428378823] [2021-05-02 14:34:51,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428378823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:34:51,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:34:51,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:34:51,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055625653] [2021-05-02 14:34:51,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:34:51,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:34:51,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:34:51,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:34:51,402 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:34:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:34:51,747 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2021-05-02 14:34:51,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:34:51,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2021-05-02 14:34:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:34:51,749 INFO L225 Difference]: With dead ends: 107 [2021-05-02 14:34:51,749 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 14:34:51,750 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:34:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 14:34:51,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2021-05-02 14:34:51,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:34:51,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-05-02 14:34:51,761 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 39 [2021-05-02 14:34:51,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:34:51,762 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-05-02 14:34:51,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:34:51,762 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-05-02 14:34:51,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 14:34:51,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:34:51,765 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:34:51,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:34:51,970 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:34:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:34:51,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1090452213, now seen corresponding path program 6 times [2021-05-02 14:34:51,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:34:51,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304601192] [2021-05-02 14:34:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:34:51,984 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:34:51,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627622631] [2021-05-02 14:34:51,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:35:08,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-02 14:35:08,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:35:08,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 14:35:08,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:35:08,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:08,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:08,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:08,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:08,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:08,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:35:08,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:35:08,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304601192] [2021-05-02 14:35:08,594 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:35:08,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627622631] [2021-05-02 14:35:08,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627622631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:35:08,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:35:08,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:35:08,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512437631] [2021-05-02 14:35:08,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:35:08,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:35:08,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:35:08,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:35:08,596 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:35:08,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:35:08,976 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2021-05-02 14:35:08,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:35:08,977 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-05-02 14:35:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:35:08,978 INFO L225 Difference]: With dead ends: 122 [2021-05-02 14:35:08,978 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 14:35:08,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:35:08,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 14:35:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2021-05-02 14:35:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 57 states have internal predecessors, (65), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:35:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-05-02 14:35:08,994 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 41 [2021-05-02 14:35:08,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:35:08,994 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-05-02 14:35:08,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:35:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-05-02 14:35:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:35:08,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:35:08,995 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:35:09,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:35:09,211 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:35:09,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:35:09,212 INFO L82 PathProgramCache]: Analyzing trace with hash -734977434, now seen corresponding path program 7 times [2021-05-02 14:35:09,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:35:09,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991271037] [2021-05-02 14:35:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:35:09,227 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:35:09,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266395898] [2021-05-02 14:35:09,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:35:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:35:09,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 14:35:09,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:35:09,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:09,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:09,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:09,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:09,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:09,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:35:09,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:35:09,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991271037] [2021-05-02 14:35:09,835 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:35:09,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266395898] [2021-05-02 14:35:09,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266395898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:35:09,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:35:09,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:35:09,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802620722] [2021-05-02 14:35:09,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:35:09,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:35:09,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:35:09,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:35:09,838 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 15 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:35:10,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:35:10,194 INFO L93 Difference]: Finished difference Result 132 states and 151 transitions. [2021-05-02 14:35:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:35:10,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 15 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2021-05-02 14:35:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:35:10,196 INFO L225 Difference]: With dead ends: 132 [2021-05-02 14:35:10,196 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 14:35:10,196 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:35:10,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 14:35:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 78. [2021-05-02 14:35:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:35:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2021-05-02 14:35:10,204 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 43 [2021-05-02 14:35:10,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:35:10,204 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2021-05-02 14:35:10,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 15 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:35:10,205 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2021-05-02 14:35:10,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 14:35:10,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:35:10,205 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:35:10,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:35:10,406 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:35:10,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:35:10,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1573868801, now seen corresponding path program 8 times [2021-05-02 14:35:10,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:35:10,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877416655] [2021-05-02 14:35:10,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:35:10,426 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:35:10,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822024093] [2021-05-02 14:35:10,427 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:35:10,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:35:10,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:35:10,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 14:35:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:35:10,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:10,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:10,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:10,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:11,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:11,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:35:11,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:35:11,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877416655] [2021-05-02 14:35:11,109 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:35:11,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822024093] [2021-05-02 14:35:11,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822024093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:35:11,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:35:11,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:35:11,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830644147] [2021-05-02 14:35:11,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:35:11,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:35:11,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:35:11,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:35:11,112 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:35:11,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:35:11,535 INFO L93 Difference]: Finished difference Result 138 states and 159 transitions. [2021-05-02 14:35:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:35:11,535 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 45 [2021-05-02 14:35:11,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:35:11,536 INFO L225 Difference]: With dead ends: 138 [2021-05-02 14:35:11,536 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 14:35:11,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:35:11,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 14:35:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2021-05-02 14:35:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 61 states have internal predecessors, (71), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:35:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-05-02 14:35:11,544 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 45 [2021-05-02 14:35:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:35:11,545 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-05-02 14:35:11,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:35:11,545 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-05-02 14:35:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 14:35:11,546 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:35:11,546 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:35:11,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:35:11,750 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:35:11,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:35:11,750 INFO L82 PathProgramCache]: Analyzing trace with hash -181810180, now seen corresponding path program 9 times [2021-05-02 14:35:11,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:35:11,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832824405] [2021-05-02 14:35:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:35:11,766 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:35:11,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640492580] [2021-05-02 14:35:11,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:35:15,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:35:15,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:35:15,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 14:35:15,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:35:15,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:15,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:15,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:15,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:35:15,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:35:15,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832824405] [2021-05-02 14:35:15,715 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:35:15,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640492580] [2021-05-02 14:35:15,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640492580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:35:15,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:35:15,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:35:15,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117589953] [2021-05-02 14:35:15,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:35:15,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:35:15,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:35:15,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:35:15,718 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:35:15,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:35:15,781 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2021-05-02 14:35:15,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:35:15,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2021-05-02 14:35:15,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:35:15,783 INFO L225 Difference]: With dead ends: 98 [2021-05-02 14:35:15,783 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 14:35:15,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:35:15,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 14:35:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 14:35:15,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 52 states have internal predecessors, (60), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:35:15,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-05-02 14:35:15,791 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 47 [2021-05-02 14:35:15,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:35:15,792 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-05-02 14:35:15,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:35:15,792 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-05-02 14:35:15,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 14:35:15,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:35:15,792 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:35:16,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:35:16,001 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:35:16,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:35:16,002 INFO L82 PathProgramCache]: Analyzing trace with hash -122991396, now seen corresponding path program 10 times [2021-05-02 14:35:16,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:35:16,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710332060] [2021-05-02 14:35:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:35:16,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:35:16,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351509776] [2021-05-02 14:35:16,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:35:16,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:35:16,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:35:16,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 14:35:16,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:35:16,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:16,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:16,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:16,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:16,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:16,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:35:16,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:35:16,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710332060] [2021-05-02 14:35:16,758 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:35:16,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351509776] [2021-05-02 14:35:16,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351509776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:35:16,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:35:16,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 14:35:16,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234521254] [2021-05-02 14:35:16,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 14:35:16,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:35:16,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 14:35:16,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:35:16,760 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:35:17,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:35:17,322 INFO L93 Difference]: Finished difference Result 131 states and 158 transitions. [2021-05-02 14:35:17,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:35:17,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2021-05-02 14:35:17,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:35:17,323 INFO L225 Difference]: With dead ends: 131 [2021-05-02 14:35:17,323 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 14:35:17,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 298.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:35:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 14:35:17,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2021-05-02 14:35:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 77 states have internal predecessors, (91), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 14:35:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-05-02 14:35:17,336 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 47 [2021-05-02 14:35:17,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:35:17,337 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-05-02 14:35:17,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:35:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-05-02 14:35:17,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 14:35:17,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:35:17,338 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:35:17,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:35:17,541 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:35:17,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:35:17,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1223112983, now seen corresponding path program 11 times [2021-05-02 14:35:17,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:35:17,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456088490] [2021-05-02 14:35:17,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:35:17,548 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:35:17,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253911850] [2021-05-02 14:35:17,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:35:17,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-02 14:35:17,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:35:17,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 14:35:17,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:35:17,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:17,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:18,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:18,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:18,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:18,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:18,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:18,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 14:35:18,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:35:18,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456088490] [2021-05-02 14:35:18,332 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:35:18,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253911850] [2021-05-02 14:35:18,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253911850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:35:18,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:35:18,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:35:18,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137495822] [2021-05-02 14:35:18,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:35:18,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:35:18,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:35:18,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:35:18,333 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:35:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:35:18,816 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2021-05-02 14:35:18,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:35:18,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 49 [2021-05-02 14:35:18,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:35:18,817 INFO L225 Difference]: With dead ends: 141 [2021-05-02 14:35:18,817 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 14:35:18,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:35:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 14:35:18,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 124. [2021-05-02 14:35:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 92 states have (on average 1.184782608695652) internal successors, (109), 96 states have internal predecessors, (109), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 14:35:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2021-05-02 14:35:18,828 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 49 [2021-05-02 14:35:18,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:35:18,828 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2021-05-02 14:35:18,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:35:18,828 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2021-05-02 14:35:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 14:35:18,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:35:18,829 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:35:19,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:35:19,033 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:35:19,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:35:19,034 INFO L82 PathProgramCache]: Analyzing trace with hash 211995733, now seen corresponding path program 1 times [2021-05-02 14:35:19,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:35:19,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834982388] [2021-05-02 14:35:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:35:19,041 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:35:19,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064313342] [2021-05-02 14:35:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:35:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:35:19,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 14:35:19,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:35:19,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:19,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:19,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:19,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:19,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:19,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:19,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:19,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:35:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:35:19,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:35:19,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834982388] [2021-05-02 14:35:19,523 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:35:19,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064313342] [2021-05-02 14:35:19,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064313342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:35:19,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:35:19,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:35:19,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878673570] [2021-05-02 14:35:19,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:35:19,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:35:19,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:35:19,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:35:19,524 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:35:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:35:19,843 INFO L93 Difference]: Finished difference Result 144 states and 170 transitions. [2021-05-02 14:35:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:35:19,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 49 [2021-05-02 14:35:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:35:19,844 INFO L225 Difference]: With dead ends: 144 [2021-05-02 14:35:19,845 INFO L226 Difference]: Without dead ends: 140 [2021-05-02 14:35:19,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:35:19,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-02 14:35:19,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2021-05-02 14:35:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 89 states have internal predecessors, (104), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 14:35:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2021-05-02 14:35:19,854 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 49 [2021-05-02 14:35:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:35:19,854 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2021-05-02 14:35:19,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:35:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2021-05-02 14:35:19,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 14:35:19,855 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:35:19,855 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:35:20,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:35:20,062 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:35:20,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:35:20,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1281931767, now seen corresponding path program 12 times [2021-05-02 14:35:20,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:35:20,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698925642] [2021-05-02 14:35:20,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:35:20,089 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:35:20,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449219908] [2021-05-02 14:35:20,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:46,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 14:36:46,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:36:46,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 14:36:46,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:47,264 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-02 14:36:47,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:47,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698925642] [2021-05-02 14:36:47,285 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:47,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449219908] [2021-05-02 14:36:47,285 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_37_48_101_169 already exists [2021-05-02 14:36:47,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:36:47,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 14:36:47,286 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 14:36:47,286 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 14:36:47,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:36:47,516 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 14:36:47,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:36:47 BoogieIcfgContainer [2021-05-02 14:36:47,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:36:47,517 INFO L168 Benchmark]: Toolchain (without parser) took 122472.37 ms. Allocated memory was 188.7 MB in the beginning and 233.8 MB in the end (delta: 45.1 MB). Free memory was 153.0 MB in the beginning and 128.6 MB in the end (delta: 24.4 MB). Peak memory consumption was 70.5 MB. Max. memory is 8.0 GB. [2021-05-02 14:36:47,517 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 188.7 MB. Free memory is still 169.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:36:47,518 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.25 ms. Allocated memory is still 188.7 MB. Free memory was 152.6 MB in the beginning and 171.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-02 14:36:47,518 INFO L168 Benchmark]: Boogie Preprocessor took 39.09 ms. Allocated memory is still 188.7 MB. Free memory was 171.0 MB in the beginning and 169.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:36:47,518 INFO L168 Benchmark]: RCFGBuilder took 343.58 ms. Allocated memory is still 188.7 MB. Free memory was 169.6 MB in the beginning and 154.5 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:36:47,518 INFO L168 Benchmark]: TraceAbstraction took 121783.40 ms. Allocated memory was 188.7 MB in the beginning and 233.8 MB in the end (delta: 45.1 MB). Free memory was 153.8 MB in the beginning and 128.6 MB in the end (delta: 25.2 MB). Peak memory consumption was 71.2 MB. Max. memory is 8.0 GB. [2021-05-02 14:36:47,518 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 188.7 MB. Free memory is still 169.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 287.25 ms. Allocated memory is still 188.7 MB. Free memory was 152.6 MB in the beginning and 171.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.09 ms. Allocated memory is still 188.7 MB. Free memory was 171.0 MB in the beginning and 169.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 343.58 ms. Allocated memory is still 188.7 MB. Free memory was 169.6 MB in the beginning and 154.5 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 121783.40 ms. Allocated memory was 188.7 MB in the beginning and 233.8 MB in the end (delta: 45.1 MB). Free memory was 153.8 MB in the beginning and 128.6 MB in the end (delta: 25.2 MB). Peak memory consumption was 71.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_unsigned_int() [L29] CALL assume_abort_if_not(A>=0 && A<=100) [L16] COND FALSE !(!cond) [L29] RET assume_abort_if_not(A>=0 && A<=100) [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND TRUE !(r >= b) [L38] COND TRUE 1 [L39] CALL __VERIFIER_assert(A == q * b + r) [L19] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(A == q * b + r) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND TRUE r >= b [L44] q = q + 1 [L45] r = r - b [L38] COND TRUE 1 [L39] CALL __VERIFIER_assert(A == q * b + r) [L19] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(A == q * b + r) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND TRUE r >= b [L44] q = q + 1 [L45] r = r - b [L38] COND TRUE 1 [L39] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 121714.8ms, OverallIterations: 17, TraceHistogramMax: 8, EmptinessCheckTime: 25.6ms, AutomataDifference: 4036.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 453 SDtfs, 399 SDslu, 3247 SDs, 0 SdLazy, 4281 SolverSat, 228 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2632.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 580 GetRequests, 379 SyntacticMatches, 8 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2841.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=15, InterpolantAutomatonStates: 195, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 155.7ms AutomataMinimizationTime, 16 MinimizatonAttempts, 196 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 120.2ms SsaConstructionTime, 21355.9ms SatisfiabilityAnalysisTime, 4664.8ms InterpolantComputationTime, 575 NumberOfCodeBlocks, 571 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 559 ConstructedInterpolants, 0 QuantifiedInterpolants, 5069 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1967 ConjunctsInSsa, 524 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 115/384 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...