/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/egcd3-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:00:22,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:00:22,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:00:22,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:00:22,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:00:22,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:00:22,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:00:22,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:00:22,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:00:22,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:00:22,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:00:22,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:00:22,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:00:22,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:00:22,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:00:22,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:00:22,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:00:22,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:00:22,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:00:22,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:00:22,210 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:00:22,232 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:00:22,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:00:22,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:00:22,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:00:22,235 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:00:22,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:00:22,236 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:00:22,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:00:22,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:00:22,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:00:22,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:00:22,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:00:22,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:00:22,237 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:00:22,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:00:22,237 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:00:22,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:00:22,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:00:22,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:00:22,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:00:22,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:00:22,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:00:22,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:00:22,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:00:22,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:00:22,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:00:22,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:00:22,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:00:22,238 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:00:22,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:00:22,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:00:22,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:00:22,535 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:00:22,536 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:00:22,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2021-05-02 15:00:22,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0c59a4f6/b531417fd4844d229d531adc24e8a22e/FLAG9f7feaab4 [2021-05-02 15:00:22,968 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:00:22,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2021-05-02 15:00:22,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0c59a4f6/b531417fd4844d229d531adc24e8a22e/FLAG9f7feaab4 [2021-05-02 15:00:23,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0c59a4f6/b531417fd4844d229d531adc24e8a22e [2021-05-02 15:00:23,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:00:23,358 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:00:23,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:00:23,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:00:23,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:00:23,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:00:23" (1/1) ... [2021-05-02 15:00:23,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@498b82ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:23, skipping insertion in model container [2021-05-02 15:00:23,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:00:23" (1/1) ... [2021-05-02 15:00:23,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:00:23,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:00:23,495 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/egcd3-ll_valuebound10.c[490,503] [2021-05-02 15:00:23,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:00:23,530 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:00:23,538 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/egcd3-ll_valuebound10.c[490,503] [2021-05-02 15:00:23,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:00:23,568 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:00:23,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:23 WrapperNode [2021-05-02 15:00:23,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:00:23,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:00:23,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:00:23,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:00:23,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:23" (1/1) ... [2021-05-02 15:00:23,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:23" (1/1) ... [2021-05-02 15:00:23,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:23" (1/1) ... [2021-05-02 15:00:23,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:23" (1/1) ... [2021-05-02 15:00:23,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:23" (1/1) ... [2021-05-02 15:00:23,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:23" (1/1) ... [2021-05-02 15:00:23,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:23" (1/1) ... [2021-05-02 15:00:23,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:00:23,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:00:23,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:00:23,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:00:23,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:00:23,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:00:23,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:00:23,744 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:00:23,744 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:00:23,745 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:00:23,745 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:00:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:00:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:00:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:00:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:00:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:00:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:00:23,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:00:23,747 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:00:23,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:00:23,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:00:23,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:00:23,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:00:23,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:00:23,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:00:23,995 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:00:23,995 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:00:23,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:00:23 BoogieIcfgContainer [2021-05-02 15:00:23,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:00:23,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:00:23,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:00:23,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:00:23,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:00:23" (1/3) ... [2021-05-02 15:00:24,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@680f2bf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:00:24, skipping insertion in model container [2021-05-02 15:00:24,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:23" (2/3) ... [2021-05-02 15:00:24,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@680f2bf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:00:24, skipping insertion in model container [2021-05-02 15:00:24,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:00:23" (3/3) ... [2021-05-02 15:00:24,001 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2021-05-02 15:00:24,005 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:00:24,007 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:00:24,019 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:00:24,034 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:00:24,034 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:00:24,034 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:00:24,034 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:00:24,034 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:00:24,034 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:00:24,034 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:00:24,034 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:00:24,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:00:24,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:00:24,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:24,047 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:24,048 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:24,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2021-05-02 15:00:24,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:24,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361871136] [2021-05-02 15:00:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:24,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:00:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:24,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:00:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:24,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:00:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:24,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:00:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:24,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:00:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:00:24,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:24,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361871136] [2021-05-02 15:00:24,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361871136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:24,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:24,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:00:24,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279107489] [2021-05-02 15:00:24,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:00:24,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:24,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:00:24,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:00:24,410 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:00:24,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:24,554 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2021-05-02 15:00:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:00:24,556 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:00:24,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:24,562 INFO L225 Difference]: With dead ends: 73 [2021-05-02 15:00:24,562 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:00:24,565 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:00:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:00:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 15:00:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:00:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 15:00:24,612 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-02 15:00:24,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:24,612 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 15:00:24,612 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:00:24,612 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 15:00:24,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 15:00:24,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:24,614 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:24,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:00:24,614 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:24,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:24,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2021-05-02 15:00:24,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:24,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453702905] [2021-05-02 15:00:24,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:24,652 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:24,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416160070] [2021-05-02 15:00:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:24,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:00:24,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:24,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:00:24,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:24,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453702905] [2021-05-02 15:00:24,834 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:24,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416160070] [2021-05-02 15:00:24,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416160070] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:24,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:24,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:00:24,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339032257] [2021-05-02 15:00:24,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:00:24,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:24,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:00:24,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:00:24,836 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:00:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:24,936 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-02 15:00:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:00:24,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-02 15:00:24,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:24,937 INFO L225 Difference]: With dead ends: 54 [2021-05-02 15:00:24,938 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 15:00:24,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 15:00:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-02 15:00:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:00:24,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:00:24,949 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-02 15:00:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:24,950 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:00:24,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:00:24,950 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:00:24,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 15:00:24,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:24,951 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:25,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:00:25,154 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:25,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2021-05-02 15:00:25,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:25,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22132802] [2021-05-02 15:00:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:25,166 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:25,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48250507] [2021-05-02 15:00:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:25,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:00:25,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:25,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:00:25,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:25,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22132802] [2021-05-02 15:00:25,439 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:25,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48250507] [2021-05-02 15:00:25,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48250507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:25,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:25,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:00:25,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191877225] [2021-05-02 15:00:25,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:00:25,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:25,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:00:25,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:25,441 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:00:25,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:25,563 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-05-02 15:00:25,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:00:25,564 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-02 15:00:25,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:25,566 INFO L225 Difference]: With dead ends: 53 [2021-05-02 15:00:25,567 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 15:00:25,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:25,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 15:00:25,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 15:00:25,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:00:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-02 15:00:25,592 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-02 15:00:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:25,593 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-02 15:00:25,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:00:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-02 15:00:25,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:00:25,594 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:25,595 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:25,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:25,809 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:25,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:25,810 INFO L82 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2021-05-02 15:00:25,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:25,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732170248] [2021-05-02 15:00:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:25,820 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:25,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359012573] [2021-05-02 15:00:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:25,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:00:25,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:25,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:00:25,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732170248] [2021-05-02 15:00:25,987 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359012573] [2021-05-02 15:00:25,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359012573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:25,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:25,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:00:25,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855930683] [2021-05-02 15:00:25,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:00:25,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:25,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:00:25,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:25,988 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:00:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:26,216 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2021-05-02 15:00:26,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:00:26,217 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 15:00:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:26,218 INFO L225 Difference]: With dead ends: 103 [2021-05-02 15:00:26,218 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 15:00:26,218 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 15:00:26,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-02 15:00:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 15:00:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-02 15:00:26,230 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-02 15:00:26,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:26,230 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-02 15:00:26,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:00:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-02 15:00:26,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 15:00:26,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:26,231 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:26,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:26,443 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2021-05-02 15:00:26,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:26,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718863297] [2021-05-02 15:00:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:26,455 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:26,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949760779] [2021-05-02 15:00:26,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:26,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:00:26,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:26,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:00:26,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:26,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718863297] [2021-05-02 15:00:26,692 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:26,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949760779] [2021-05-02 15:00:26,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949760779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:26,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:26,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:00:26,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219992071] [2021-05-02 15:00:26,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:00:26,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:26,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:00:26,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:26,694 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:00:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:26,801 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2021-05-02 15:00:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:00:26,802 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-02 15:00:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:26,803 INFO L225 Difference]: With dead ends: 79 [2021-05-02 15:00:26,803 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 15:00:26,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:26,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 15:00:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-05-02 15:00:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 15:00:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-02 15:00:26,812 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-02 15:00:26,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:26,813 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-02 15:00:26,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:00:26,813 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-02 15:00:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 15:00:26,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:26,814 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:27,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:27,037 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:27,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:27,037 INFO L82 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2021-05-02 15:00:27,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:27,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233794832] [2021-05-02 15:00:27,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:27,056 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:27,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025420366] [2021-05-02 15:00:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:27,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 15:00:27,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:27,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:00:27,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:27,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233794832] [2021-05-02 15:00:27,280 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:27,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025420366] [2021-05-02 15:00:27,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025420366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:27,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:27,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:00:27,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145117395] [2021-05-02 15:00:27,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:00:27,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:27,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:00:27,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:27,281 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:00:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:27,421 INFO L93 Difference]: Finished difference Result 111 states and 147 transitions. [2021-05-02 15:00:27,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:00:27,421 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-02 15:00:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:27,425 INFO L225 Difference]: With dead ends: 111 [2021-05-02 15:00:27,425 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 15:00:27,425 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:27,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 15:00:27,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-05-02 15:00:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 15:00:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2021-05-02 15:00:27,452 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2021-05-02 15:00:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:27,452 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2021-05-02 15:00:27,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:00:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2021-05-02 15:00:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:00:27,454 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:27,454 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:27,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:00:27,665 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2021-05-02 15:00:27,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:27,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26282975] [2021-05-02 15:00:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:27,673 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:27,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781947513] [2021-05-02 15:00:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:00:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:27,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:00:27,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:27,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:00:27,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:27,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26282975] [2021-05-02 15:00:27,825 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:27,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781947513] [2021-05-02 15:00:27,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781947513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:27,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:27,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:00:27,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637168962] [2021-05-02 15:00:27,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:00:27,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:27,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:00:27,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:27,826 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:00:27,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:27,966 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2021-05-02 15:00:27,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:00:27,966 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-02 15:00:27,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:27,967 INFO L225 Difference]: With dead ends: 118 [2021-05-02 15:00:27,967 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 15:00:27,968 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:27,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 15:00:27,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 15:00:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.25) internal successors, (95), 77 states have internal predecessors, (95), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 15:00:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2021-05-02 15:00:27,980 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 47 [2021-05-02 15:00:27,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:27,980 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2021-05-02 15:00:27,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:00:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2021-05-02 15:00:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:00:27,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:27,981 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:28,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:28,199 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:28,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2021-05-02 15:00:28,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:28,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283566493] [2021-05-02 15:00:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:28,206 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:28,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81697719] [2021-05-02 15:00:28,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:00:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:28,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 15:00:28,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:28,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:00:28,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:28,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283566493] [2021-05-02 15:00:28,472 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:28,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81697719] [2021-05-02 15:00:28,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81697719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:28,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:28,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:00:28,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270172948] [2021-05-02 15:00:28,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:00:28,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:28,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:00:28,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:28,473 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:00:28,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:28,653 INFO L93 Difference]: Finished difference Result 124 states and 163 transitions. [2021-05-02 15:00:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:00:28,654 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-05-02 15:00:28,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:28,656 INFO L225 Difference]: With dead ends: 124 [2021-05-02 15:00:28,656 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 15:00:28,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:00:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 15:00:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-05-02 15:00:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 79 states have (on average 1.240506329113924) internal successors, (98), 80 states have internal predecessors, (98), 31 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 15:00:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2021-05-02 15:00:28,669 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 47 [2021-05-02 15:00:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:28,670 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2021-05-02 15:00:28,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:00:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2021-05-02 15:00:28,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:00:28,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:28,672 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:28,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:28,887 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:28,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:28,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 2 times [2021-05-02 15:00:28,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:28,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344845937] [2021-05-02 15:00:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:28,898 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:28,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021908909] [2021-05-02 15:00:28,898 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 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 15:00:28,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:28,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:28,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:00:28,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:28,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:28,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:00:29,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:29,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344845937] [2021-05-02 15:00:29,022 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:29,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021908909] [2021-05-02 15:00:29,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021908909] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:29,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:29,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:00:29,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539632173] [2021-05-02 15:00:29,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:00:29,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:29,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:00:29,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:00:29,023 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:00:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:29,092 INFO L93 Difference]: Finished difference Result 168 states and 232 transitions. [2021-05-02 15:00:29,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:00:29,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-02 15:00:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:29,094 INFO L225 Difference]: With dead ends: 168 [2021-05-02 15:00:29,094 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 15:00:29,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:00:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 15:00:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2021-05-02 15:00:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 69 states have internal predecessors, (81), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 15:00:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2021-05-02 15:00:29,104 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 47 [2021-05-02 15:00:29,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:29,105 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2021-05-02 15:00:29,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:00:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2021-05-02 15:00:29,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 15:00:29,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:29,105 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:29,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 15:00:29,321 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:29,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:29,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2021-05-02 15:00:29,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:29,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680953390] [2021-05-02 15:00:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:29,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:29,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109005728] [2021-05-02 15:00:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:00:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:29,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:00:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:29,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 15:00:29,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:29,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680953390] [2021-05-02 15:00:29,474 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:29,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109005728] [2021-05-02 15:00:29,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109005728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:29,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:29,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:00:29,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533715177] [2021-05-02 15:00:29,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:00:29,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:29,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:00:29,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:00:29,477 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 15:00:29,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:29,549 INFO L93 Difference]: Finished difference Result 154 states and 211 transitions. [2021-05-02 15:00:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:00:29,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-02 15:00:29,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:29,551 INFO L225 Difference]: With dead ends: 154 [2021-05-02 15:00:29,551 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 15:00:29,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:29,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 15:00:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2021-05-02 15:00:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 82 states have internal predecessors, (89), 47 states have call successors, (47), 10 states have call predecessors, (47), 9 states have return successors, (45), 40 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 15:00:29,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 181 transitions. [2021-05-02 15:00:29,564 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 181 transitions. Word has length 52 [2021-05-02 15:00:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:29,564 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 181 transitions. [2021-05-02 15:00:29,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 15:00:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 181 transitions. [2021-05-02 15:00:29,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 15:00:29,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:29,565 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:29,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:29,783 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:29,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:29,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1926690588, now seen corresponding path program 1 times [2021-05-02 15:00:29,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:29,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751413462] [2021-05-02 15:00:29,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:29,792 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:29,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269713842] [2021-05-02 15:00:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order 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 15:00:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:29,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:00:29,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:29,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:00:29,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:29,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751413462] [2021-05-02 15:00:29,981 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:29,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269713842] [2021-05-02 15:00:29,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269713842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:29,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:29,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:00:29,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322618977] [2021-05-02 15:00:29,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:00:29,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:29,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:00:29,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:29,982 INFO L87 Difference]: Start difference. First operand 133 states and 181 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:00:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:30,225 INFO L93 Difference]: Finished difference Result 185 states and 261 transitions. [2021-05-02 15:00:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:00:30,226 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 52 [2021-05-02 15:00:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:30,228 INFO L225 Difference]: With dead ends: 185 [2021-05-02 15:00:30,228 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 15:00:30,228 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:00:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 15:00:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2021-05-02 15:00:30,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 82 states have (on average 1.170731707317073) internal successors, (96), 89 states have internal predecessors, (96), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 15:00:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 204 transitions. [2021-05-02 15:00:30,247 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 204 transitions. Word has length 52 [2021-05-02 15:00:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:30,247 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 204 transitions. [2021-05-02 15:00:30,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:00:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 204 transitions. [2021-05-02 15:00:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 15:00:30,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:30,248 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:30,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:30,461 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:30,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:30,461 INFO L82 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2021-05-02 15:00:30,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:30,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611547346] [2021-05-02 15:00:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:30,468 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:30,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829636641] [2021-05-02 15:00:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:00:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:30,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 15:00:30,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:30,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:30,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:30,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:30,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:30,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:30,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:30,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:30,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:30,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:30,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:30,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:30,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 15:00:30,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:30,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611547346] [2021-05-02 15:00:30,895 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:30,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829636641] [2021-05-02 15:00:30,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829636641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:30,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:30,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 15:00:30,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322185118] [2021-05-02 15:00:30,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 15:00:30,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:30,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 15:00:30,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:00:30,897 INFO L87 Difference]: Start difference. First operand 148 states and 204 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 15:00:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:31,375 INFO L93 Difference]: Finished difference Result 261 states and 355 transitions. [2021-05-02 15:00:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 15:00:31,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-02 15:00:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:31,377 INFO L225 Difference]: With dead ends: 261 [2021-05-02 15:00:31,377 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 15:00:31,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 369.1ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 15:00:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 15:00:31,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-05-02 15:00:31,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 113 states have internal predecessors, (123), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-02 15:00:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 247 transitions. [2021-05-02 15:00:31,394 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 247 transitions. Word has length 64 [2021-05-02 15:00:31,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:31,394 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 247 transitions. [2021-05-02 15:00:31,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 15:00:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 247 transitions. [2021-05-02 15:00:31,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 15:00:31,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:31,395 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:31,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 15:00:31,609 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:31,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:31,609 INFO L82 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 2 times [2021-05-02 15:00:31,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:31,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400414355] [2021-05-02 15:00:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:31,615 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:31,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220949808] [2021-05-02 15:00:31,615 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 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 15:00:31,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:31,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:31,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 15:00:31,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:31,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 15:00:31,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:31,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400414355] [2021-05-02 15:00:31,795 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:31,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220949808] [2021-05-02 15:00:31,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220949808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:31,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:31,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:00:31,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76527285] [2021-05-02 15:00:31,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:00:31,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:31,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:00:31,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:31,796 INFO L87 Difference]: Start difference. First operand 183 states and 247 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 15:00:32,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:32,081 INFO L93 Difference]: Finished difference Result 327 states and 483 transitions. [2021-05-02 15:00:32,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 15:00:32,082 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-02 15:00:32,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:32,084 INFO L225 Difference]: With dead ends: 327 [2021-05-02 15:00:32,084 INFO L226 Difference]: Without dead ends: 320 [2021-05-02 15:00:32,085 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:00:32,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-02 15:00:32,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 217. [2021-05-02 15:00:32,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 134 states have internal predecessors, (153), 75 states have call successors, (75), 14 states have call predecessors, (75), 13 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 15:00:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 301 transitions. [2021-05-02 15:00:32,111 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 301 transitions. Word has length 69 [2021-05-02 15:00:32,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:32,111 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 301 transitions. [2021-05-02 15:00:32,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 15:00:32,111 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 301 transitions. [2021-05-02 15:00:32,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 15:00:32,112 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:32,112 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:32,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 15:00:32,326 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:32,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:32,327 INFO L82 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2021-05-02 15:00:32,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:32,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693106812] [2021-05-02 15:00:32,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:32,332 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:32,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060753607] [2021-05-02 15:00:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:00:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:32,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 15:00:32,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:32,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 15:00:32,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:32,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693106812] [2021-05-02 15:00:32,549 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:32,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060753607] [2021-05-02 15:00:32,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060753607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:32,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:32,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:00:32,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982012900] [2021-05-02 15:00:32,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:00:32,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:32,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:00:32,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:32,551 INFO L87 Difference]: Start difference. First operand 217 states and 301 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 15:00:32,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:32,718 INFO L93 Difference]: Finished difference Result 248 states and 343 transitions. [2021-05-02 15:00:32,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:00:32,718 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-05-02 15:00:32,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:32,720 INFO L225 Difference]: With dead ends: 248 [2021-05-02 15:00:32,720 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 15:00:32,721 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:00:32,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 15:00:32,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-05-02 15:00:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 144 states have internal predecessors, (163), 83 states have call successors, (83), 16 states have call predecessors, (83), 15 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-02 15:00:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 327 transitions. [2021-05-02 15:00:32,743 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 327 transitions. Word has length 74 [2021-05-02 15:00:32,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:32,743 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 327 transitions. [2021-05-02 15:00:32,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 15:00:32,743 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 327 transitions. [2021-05-02 15:00:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 15:00:32,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:32,744 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:32,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:00:32,961 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2021-05-02 15:00:32,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:32,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602055791] [2021-05-02 15:00:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:32,966 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:32,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108224959] [2021-05-02 15:00:32,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:00:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:33,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 15:00:33,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:33,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 15:00:33,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:33,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602055791] [2021-05-02 15:00:33,416 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:33,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108224959] [2021-05-02 15:00:33,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108224959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:33,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:33,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 15:00:33,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972398304] [2021-05-02 15:00:33,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 15:00:33,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:33,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 15:00:33,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 15:00:33,417 INFO L87 Difference]: Start difference. First operand 236 states and 327 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:00:34,580 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 15:00:34,964 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 15:00:36,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:36,137 INFO L93 Difference]: Finished difference Result 371 states and 534 transitions. [2021-05-02 15:00:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 15:00:36,145 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2021-05-02 15:00:36,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:36,149 INFO L225 Difference]: With dead ends: 371 [2021-05-02 15:00:36,149 INFO L226 Difference]: Without dead ends: 369 [2021-05-02 15:00:36,150 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1662.2ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 15:00:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-02 15:00:36,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 345. [2021-05-02 15:00:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 196 states have (on average 1.2142857142857142) internal successors, (238), 208 states have internal predecessors, (238), 131 states have call successors, (131), 18 states have call predecessors, (131), 17 states have return successors, (129), 118 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-02 15:00:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 498 transitions. [2021-05-02 15:00:36,205 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 498 transitions. Word has length 72 [2021-05-02 15:00:36,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:36,205 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 498 transitions. [2021-05-02 15:00:36,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:00:36,206 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 498 transitions. [2021-05-02 15:00:36,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 15:00:36,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:36,206 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:36,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:36,426 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:36,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:36,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 2 times [2021-05-02 15:00:36,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:36,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242799425] [2021-05-02 15:00:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:36,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:36,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730521506] [2021-05-02 15:00:36,438 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 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 15:00:36,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:36,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:36,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 15:00:36,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:36,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 15:00:36,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:36,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242799425] [2021-05-02 15:00:36,599 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:36,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730521506] [2021-05-02 15:00:36,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730521506] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:36,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:36,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:00:36,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830992913] [2021-05-02 15:00:36,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:00:36,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:36,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:00:36,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:00:36,600 INFO L87 Difference]: Start difference. First operand 345 states and 498 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 15:00:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:36,679 INFO L93 Difference]: Finished difference Result 585 states and 842 transitions. [2021-05-02 15:00:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:00:36,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-02 15:00:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:36,681 INFO L225 Difference]: With dead ends: 585 [2021-05-02 15:00:36,682 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 15:00:36,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:00:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 15:00:36,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 299. [2021-05-02 15:00:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 175 states have (on average 1.2) internal successors, (210), 178 states have internal predecessors, (210), 107 states have call successors, (107), 17 states have call predecessors, (107), 16 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-05-02 15:00:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 422 transitions. [2021-05-02 15:00:36,727 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 422 transitions. Word has length 77 [2021-05-02 15:00:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:36,727 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 422 transitions. [2021-05-02 15:00:36,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 15:00:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 422 transitions. [2021-05-02 15:00:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 15:00:36,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:36,728 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:36,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 15:00:36,949 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:36,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:36,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2139677040, now seen corresponding path program 3 times [2021-05-02 15:00:36,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:36,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670208720] [2021-05-02 15:00:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:36,961 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:36,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080692423] [2021-05-02 15:00:36,962 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 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 15:00:37,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:00:37,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:37,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 15:00:37,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:37,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-05-02 15:00:37,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:37,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670208720] [2021-05-02 15:00:37,131 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:37,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080692423] [2021-05-02 15:00:37,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080692423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:37,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:37,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 15:00:37,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647182243] [2021-05-02 15:00:37,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:00:37,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:37,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:00:37,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:00:37,145 INFO L87 Difference]: Start difference. First operand 299 states and 422 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 15:00:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:37,251 INFO L93 Difference]: Finished difference Result 342 states and 489 transitions. [2021-05-02 15:00:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:00:37,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-02 15:00:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:37,253 INFO L225 Difference]: With dead ends: 342 [2021-05-02 15:00:37,253 INFO L226 Difference]: Without dead ends: 340 [2021-05-02 15:00:37,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-02 15:00:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 333. [2021-05-02 15:00:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 188 states have (on average 1.2127659574468086) internal successors, (228), 191 states have internal predecessors, (228), 127 states have call successors, (127), 18 states have call predecessors, (127), 17 states have return successors, (125), 123 states have call predecessors, (125), 125 states have call successors, (125) [2021-05-02 15:00:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 480 transitions. [2021-05-02 15:00:37,287 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 480 transitions. Word has length 77 [2021-05-02 15:00:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:37,287 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 480 transitions. [2021-05-02 15:00:37,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 15:00:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 480 transitions. [2021-05-02 15:00:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 15:00:37,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:37,288 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:37,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 15:00:37,506 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:37,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:37,506 INFO L82 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 4 times [2021-05-02 15:00:37,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:37,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068880128] [2021-05-02 15:00:37,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:37,511 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:37,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535949064] [2021-05-02 15:00:37,512 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:37,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:00:37,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:37,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 15:00:37,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:37,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 43 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-05-02 15:00:38,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:38,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068880128] [2021-05-02 15:00:38,295 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:38,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535949064] [2021-05-02 15:00:38,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535949064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:38,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:38,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 15:00:38,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060639213] [2021-05-02 15:00:38,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 15:00:38,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:38,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 15:00:38,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:00:38,298 INFO L87 Difference]: Start difference. First operand 333 states and 480 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:00:39,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:39,207 INFO L93 Difference]: Finished difference Result 389 states and 558 transitions. [2021-05-02 15:00:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 15:00:39,208 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 77 [2021-05-02 15:00:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:39,208 INFO L225 Difference]: With dead ends: 389 [2021-05-02 15:00:39,208 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:00:39,211 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 717.7ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-05-02 15:00:39,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:00:39,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:00:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 15:00:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:00:39,212 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 77 [2021-05-02 15:00:39,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:39,212 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:00:39,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:00:39,212 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:00:39,212 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:00:39,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 15:00:39,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:00:39,688 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 195 [2021-05-02 15:00:39,857 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 195 [2021-05-02 15:00:40,033 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 195 [2021-05-02 15:00:40,147 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 185 [2021-05-02 15:00:40,456 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 178 [2021-05-02 15:00:40,586 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 178 [2021-05-02 15:00:40,723 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 26 [2021-05-02 15:00:41,358 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 27 [2021-05-02 15:00:41,964 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 27 [2021-05-02 15:00:42,512 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 27 [2021-05-02 15:00:43,062 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 28 [2021-05-02 15:00:43,545 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 27 [2021-05-02 15:00:43,978 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 27 [2021-05-02 15:00:44,038 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-02 15:00:44,038 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-02 15:00:44,038 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-02 15:00:44,038 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:00:44,039 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 15:00:44,039 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:00:44,039 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:00:44,039 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 15:00:44,039 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:00:44,039 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:00:44,039 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-02 15:00:44,039 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-02 15:00:44,039 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-02 15:00:44,039 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-02 15:00:44,039 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 10)) (.cse1 (<= 1 main_~x~0)) (.cse2 (<= main_~x~0 10))) (or (and (= main_~r~0 0) (= main_~q~0 0) .cse0 .cse1 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse2 (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 .cse1 .cse2 (< main_~b~0 main_~a~0) (<= 1 main_~y~0)))) [2021-05-02 15:00:44,039 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 73) the Hoare annotation is: (and (<= main_~y~0 10) (<= 1 main_~x~0) (<= main_~x~0 10) (< main_~b~0 main_~a~0) (<= 1 main_~y~0)) [2021-05-02 15:00:44,039 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2021-05-02 15:00:44,039 INFO L194 CegarLoopUtils]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 10)) (.cse1 (<= 1 main_~x~0)) (.cse2 (<= main_~x~0 10))) (or (and (= main_~r~0 0) (= main_~q~0 0) .cse0 .cse1 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse2 (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 .cse1 .cse2 (< main_~b~0 main_~a~0) (<= 1 main_~y~0)))) [2021-05-02 15:00:44,039 INFO L198 CegarLoopUtils]: For program point L36(lines 36 37) no Hoare annotation was computed. [2021-05-02 15:00:44,039 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 10)) [2021-05-02 15:00:44,040 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= main_~y~0 10) (<= 0 main_~x~0) (<= main_~x~0 10) (<= 0 main_~y~0)) [2021-05-02 15:00:44,040 INFO L198 CegarLoopUtils]: For program point L53(lines 49 59) no Hoare annotation was computed. [2021-05-02 15:00:44,040 INFO L194 CegarLoopUtils]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 10)) (.cse1 (<= 1 main_~x~0)) (.cse2 (<= main_~x~0 10))) (or (and (= main_~r~0 0) (= main_~q~0 0) .cse0 .cse1 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse2 (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 .cse1 .cse2 (< main_~b~0 main_~a~0) (<= 1 main_~y~0)))) [2021-05-02 15:00:44,040 INFO L198 CegarLoopUtils]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2021-05-02 15:00:44,040 INFO L198 CegarLoopUtils]: For program point L74(line 74) no Hoare annotation was computed. [2021-05-02 15:00:44,040 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~y~0 10) (<= 1 main_~x~0) (<= main_~x~0 10) (<= 0 main_~y~0)) [2021-05-02 15:00:44,040 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 10)) (.cse1 (<= 1 main_~x~0)) (.cse2 (<= main_~x~0 10))) (or (and (= main_~r~0 0) (= main_~q~0 0) .cse0 .cse1 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse2 (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 .cse1 .cse2 (< main_~b~0 main_~a~0) (<= 1 main_~y~0)))) [2021-05-02 15:00:44,040 INFO L194 CegarLoopUtils]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 10)) (.cse1 (<= 1 main_~x~0)) (.cse2 (<= main_~x~0 10))) (or (and (= main_~r~0 0) (= main_~q~0 0) .cse0 .cse1 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse2 (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 .cse1 .cse2 (< main_~b~0 main_~a~0) (<= 1 main_~y~0)))) [2021-05-02 15:00:44,040 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2021-05-02 15:00:44,040 INFO L194 CegarLoopUtils]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 10)) (.cse1 (<= main_~x~0 10)) (.cse2 (<= 1 main_~y~0))) (or (and .cse0 (<= 1 main_~x~0) .cse1 (< main_~b~0 main_~a~0) .cse2) (and (= main_~r~0 0) (= main_~q~0 0) .cse0 (= main_~a~0 main_~x~0) (= main_~b~0 main_~y~0) .cse1 .cse2 (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1)))) [2021-05-02 15:00:44,040 INFO L198 CegarLoopUtils]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2021-05-02 15:00:44,040 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2021-05-02 15:00:44,040 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-02 15:00:44,040 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-02 15:00:44,040 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-02 15:00:44,040 INFO L194 CegarLoopUtils]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 10)) (.cse1 (<= 1 main_~x~0)) (.cse2 (<= main_~x~0 10))) (or (and (= main_~r~0 0) (= main_~q~0 0) .cse0 .cse1 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse2 (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 .cse1 .cse2 (< main_~b~0 main_~a~0) (<= 1 main_~y~0)))) [2021-05-02 15:00:44,041 INFO L198 CegarLoopUtils]: For program point L43(lines 43 44) no Hoare annotation was computed. [2021-05-02 15:00:44,041 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-02 15:00:44,041 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-02 15:00:44,041 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-02 15:00:44,041 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-02 15:00:44,041 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-02 15:00:44,041 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-02 15:00:44,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:00:44 BoogieIcfgContainer [2021-05-02 15:00:44,066 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:00:44,066 INFO L168 Benchmark]: Toolchain (without parser) took 20708.30 ms. Allocated memory was 211.8 MB in the beginning and 389.0 MB in the end (delta: 177.2 MB). Free memory was 175.7 MB in the beginning and 156.6 MB in the end (delta: 19.2 MB). Peak memory consumption was 214.9 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:44,066 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 211.8 MB. Free memory is still 192.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:00:44,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.70 ms. Allocated memory is still 211.8 MB. Free memory was 175.6 MB in the beginning and 165.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:44,066 INFO L168 Benchmark]: Boogie Preprocessor took 108.37 ms. Allocated memory is still 211.8 MB. Free memory was 165.5 MB in the beginning and 194.7 MB in the end (delta: -29.3 MB). Peak memory consumption was 7.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:44,066 INFO L168 Benchmark]: RCFGBuilder took 317.57 ms. Allocated memory is still 211.8 MB. Free memory was 194.7 MB in the beginning and 178.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:44,066 INFO L168 Benchmark]: TraceAbstraction took 20068.31 ms. Allocated memory was 211.8 MB in the beginning and 389.0 MB in the end (delta: 177.2 MB). Free memory was 177.5 MB in the beginning and 156.6 MB in the end (delta: 20.9 MB). Peak memory consumption was 216.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:44,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 211.8 MB. Free memory is still 192.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 209.70 ms. Allocated memory is still 211.8 MB. Free memory was 175.6 MB in the beginning and 165.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 108.37 ms. Allocated memory is still 211.8 MB. Free memory was 165.5 MB in the beginning and 194.7 MB in the end (delta: -29.3 MB). Peak memory consumption was 7.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 317.57 ms. Allocated memory is still 211.8 MB. Free memory was 194.7 MB in the beginning and 178.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20068.31 ms. Allocated memory was 211.8 MB in the beginning and 389.0 MB in the end (delta: 177.2 MB). Free memory was 177.5 MB in the beginning and 156.6 MB in the end (delta: 20.9 MB). Peak memory consumption was 216.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15395.5ms, OverallIterations: 18, TraceHistogramMax: 8, EmptinessCheckTime: 19.2ms, AutomataDifference: 6387.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 4610.0ms, InitialAbstractionConstructionTime: 7.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 847 SDtfs, 885 SDslu, 3800 SDs, 0 SdLazy, 4126 SolverSat, 759 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2765.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1054 GetRequests, 816 SyntacticMatches, 2 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 3661.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=345occurred in iteration=15, InterpolantAutomatonStates: 204, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 376.4ms AutomataMinimizationTime, 18 MinimizatonAttempts, 299 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 304 PreInvPairs, 514 NumberOfFragments, 422 HoareAnnotationTreeSize, 304 FomulaSimplifications, 742537 FormulaSimplificationTreeSizeReduction, 1162.5ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 193653 FormulaSimplificationTreeSizeReductionInter, 3425.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 199.3ms SsaConstructionTime, 421.9ms SatisfiabilityAnalysisTime, 3609.4ms InterpolantComputationTime, 982 NumberOfCodeBlocks, 938 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 964 ConstructedInterpolants, 0 QuantifiedInterpolants, 4801 SizeOfPredicates, 90 NumberOfNonLiveVariables, 3224 ConjunctsInSsa, 423 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 802/974 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((((r == 0 && q == 0) && y <= 10) && 1 <= x) && b == y) && a == x) && x <= 10) && 1 <= b) && p == 1) && s == 1) || ((((y <= 10 && 1 <= x) && x <= 10) && b < a) && 1 <= y) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((y <= 10 && 1 <= x) && x <= 10) && b < a) && 1 <= y) || (((((((((r == 0 && q == 0) && y <= 10) && a == x) && b == y) && x <= 10) && 1 <= y) && 1 <= a) && p == 1) && s == 1) - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((((r == 0 && q == 0) && y <= 10) && 1 <= x) && b == y) && a == x) && x <= 10) && 1 <= b) && p == 1) && s == 1) || ((((y <= 10 && 1 <= x) && x <= 10) && b < a) && 1 <= y) RESULT: Ultimate proved your program to be correct! Received shutdown request...