/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:22:14,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:22:14,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:22:14,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 08:22:14,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:22:14,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:22:14,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:22:14,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:22:14,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:22:14,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:22:14,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:22:14,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:22:14,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:22:14,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:22:14,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:22:14,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:22:14,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:22:14,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:22:14,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:22:14,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:22:14,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:22:14,911 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:22:14,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:22:14,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:22:14,912 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:22:14,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:22:14,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:22:14,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:22:14,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:22:14,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:22:14,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:22:14,913 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:22:14,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:22:14,913 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:22:14,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:22:14,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:22:14,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:22:14,913 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:22:14,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:22:14,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:22:14,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:22:14,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:22:14,914 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:22:14,914 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:22:15,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:22:15,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:22:15,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:22:15,153 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:22:15,154 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:22:15,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2021-05-06 08:22:15,197 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17aa1aa1f/a83ea9215e074202b6cb5bbf8b83a9e1/FLAG4c47f3e16 [2021-05-06 08:22:15,564 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:22:15,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2021-05-06 08:22:15,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17aa1aa1f/a83ea9215e074202b6cb5bbf8b83a9e1/FLAG4c47f3e16 [2021-05-06 08:22:15,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17aa1aa1f/a83ea9215e074202b6cb5bbf8b83a9e1 [2021-05-06 08:22:15,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:22:15,586 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:22:15,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:15,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:22:15,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:22:15,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:15" (1/1) ... [2021-05-06 08:22:15,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a93ea4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:15, skipping insertion in model container [2021-05-06 08:22:15,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:15" (1/1) ... [2021-05-06 08:22:15,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:22:15,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:22:15,721 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_valuebound100.c[490,503] [2021-05-06 08:22:15,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:15,755 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:22:15,793 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_valuebound100.c[490,503] [2021-05-06 08:22:15,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:15,819 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:22:15,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:15 WrapperNode [2021-05-06 08:22:15,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:15,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:22:15,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:22:15,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:22:15,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:15" (1/1) ... [2021-05-06 08:22:15,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:15" (1/1) ... [2021-05-06 08:22:15,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:15" (1/1) ... [2021-05-06 08:22:15,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:15" (1/1) ... [2021-05-06 08:22:15,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:15" (1/1) ... [2021-05-06 08:22:15,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:15" (1/1) ... [2021-05-06 08:22:15,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:15" (1/1) ... [2021-05-06 08:22:15,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:22:15,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:22:15,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:22:15,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:22:15,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:15" (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 [2021-05-06 08:22:15,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:22:15,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:22:15,925 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:22:15,925 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:22:15,925 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:22:15,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:22:15,925 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:22:15,926 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:22:15,926 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:22:15,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:22:15,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:22:15,927 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:22:15,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:22:15,927 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:22:15,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:22:15,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:22:15,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:22:15,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:22:15,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:22:15,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:22:16,206 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:22:16,206 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:22:16,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:16 BoogieIcfgContainer [2021-05-06 08:22:16,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:22:16,208 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:22:16,208 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:22:16,210 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:22:16,215 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:16" (1/1) ... [2021-05-06 08:22:16,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:16 BasicIcfg [2021-05-06 08:22:16,230 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:22:16,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:22:16,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:22:16,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:22:16,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:22:15" (1/4) ... [2021-05-06 08:22:16,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b0e846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:16, skipping insertion in model container [2021-05-06 08:22:16,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:15" (2/4) ... [2021-05-06 08:22:16,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b0e846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:16, skipping insertion in model container [2021-05-06 08:22:16,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:16" (3/4) ... [2021-05-06 08:22:16,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b0e846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:16, skipping insertion in model container [2021-05-06 08:22:16,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:16" (4/4) ... [2021-05-06 08:22:16,237 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.cJordan [2021-05-06 08:22:16,240 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:22:16,242 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:22:16,252 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:22:16,264 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:22:16,264 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:22:16,264 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:22:16,264 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:22:16,264 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:22:16,264 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:22:16,264 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:22:16,264 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:22:16,272 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) [2021-05-06 08:22:16,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:22:16,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:16,281 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] [2021-05-06 08:22:16,282 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:16,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:16,289 INFO L82 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2021-05-06 08:22:16,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:16,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22289477] [2021-05-06 08:22:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:16,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:22:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:16,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:22:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:16,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:22:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:16,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:22:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:16,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:22:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:16,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:16,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22289477] [2021-05-06 08:22:16,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22289477] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:16,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:16,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:22:16,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177323002] [2021-05-06 08:22:16,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:22:16,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:16,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:22:16,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:16,505 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) [2021-05-06 08:22:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:16,640 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-06 08:22:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:22:16,642 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 [2021-05-06 08:22:16,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:16,646 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:22:16,647 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:22:16,647 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:22:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:22:16,668 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) [2021-05-06 08:22:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 08:22:16,670 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-06 08:22:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:16,670 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 08:22:16,670 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) [2021-05-06 08:22:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 08:22:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:22:16,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:16,672 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] [2021-05-06 08:22:16,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:22:16,672 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:16,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:16,672 INFO L82 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2021-05-06 08:22:16,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:16,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635760881] [2021-05-06 08:22:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:16,685 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:16,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552688755] [2021-05-06 08:22:16,686 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 [2021-05-06 08:22:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:16,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:16,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:16,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:16,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:16,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635760881] [2021-05-06 08:22:16,896 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:16,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552688755] [2021-05-06 08:22:16,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552688755] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:16,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:16,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:22:16,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756792712] [2021-05-06 08:22:16,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:22:16,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:16,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:22:16,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:16,898 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) [2021-05-06 08:22:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:16,958 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-06 08:22:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:16,959 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 [2021-05-06 08:22:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:16,960 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:22:16,960 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:22:16,960 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:22:16,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-06 08:22:16,965 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) [2021-05-06 08:22:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 08:22:16,966 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-06 08:22:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:16,966 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 08:22:16,966 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) [2021-05-06 08:22:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 08:22:16,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:22:16,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:16,967 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] [2021-05-06 08:22:17,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:22:17,185 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:17,185 INFO L82 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2021-05-06 08:22:17,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:17,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705995936] [2021-05-06 08:22:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:17,197 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:17,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763113589] [2021-05-06 08:22:17,197 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 [2021-05-06 08:22:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:17,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:22:17,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:17,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:17,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:17,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705995936] [2021-05-06 08:22:17,414 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:17,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763113589] [2021-05-06 08:22:17,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763113589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:17,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:17,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:22:17,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125602481] [2021-05-06 08:22:17,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:17,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:17,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:17,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:17,415 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:17,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:17,531 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-05-06 08:22:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:17,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 08:22:17,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:17,533 INFO L225 Difference]: With dead ends: 51 [2021-05-06 08:22:17,533 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 08:22:17,533 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 08:22:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-06 08:22:17,537 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) [2021-05-06 08:22:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 08:22:17,538 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-06 08:22:17,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:17,539 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 08:22:17,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 08:22:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:22:17,540 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:17,540 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] [2021-05-06 08:22:17,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:17,767 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:17,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:17,768 INFO L82 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2021-05-06 08:22:17,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:17,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568560585] [2021-05-06 08:22:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:17,778 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:17,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136357313] [2021-05-06 08:22:17,779 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 [2021-05-06 08:22:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:17,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:22:17,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:17,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:17,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:17,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568560585] [2021-05-06 08:22:17,929 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:17,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136357313] [2021-05-06 08:22:17,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136357313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:17,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:17,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:17,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386079512] [2021-05-06 08:22:17,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:17,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:17,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:17,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:17,931 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) [2021-05-06 08:22:18,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:18,068 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2021-05-06 08:22:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:18,069 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 [2021-05-06 08:22:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:18,070 INFO L225 Difference]: With dead ends: 96 [2021-05-06 08:22:18,070 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 08:22:18,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:18,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 08:22:18,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-06 08:22:18,077 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) [2021-05-06 08:22:18,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-06 08:22:18,079 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-06 08:22:18,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:18,079 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-06 08:22:18,079 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) [2021-05-06 08:22:18,079 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-06 08:22:18,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:18,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:18,080 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] [2021-05-06 08:22:18,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:18,297 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:18,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2021-05-06 08:22:18,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:18,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027011876] [2021-05-06 08:22:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:18,308 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:18,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621462752] [2021-05-06 08:22:18,308 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 [2021-05-06 08:22:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:18,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:22:18,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:18,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:18,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:18,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027011876] [2021-05-06 08:22:18,597 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:18,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621462752] [2021-05-06 08:22:18,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621462752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:18,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:18,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:18,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99829613] [2021-05-06 08:22:18,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:18,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:18,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:18,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:18,598 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 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) [2021-05-06 08:22:18,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:18,820 INFO L93 Difference]: Finished difference Result 84 states and 112 transitions. [2021-05-06 08:22:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:18,821 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 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 [2021-05-06 08:22:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:18,825 INFO L225 Difference]: With dead ends: 84 [2021-05-06 08:22:18,825 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 08:22:18,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:18,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 08:22:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-05-06 08:22:18,839 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) [2021-05-06 08:22:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-06 08:22:18,841 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-06 08:22:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:18,841 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-06 08:22:18,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 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) [2021-05-06 08:22:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-06 08:22:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:18,842 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:18,842 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] [2021-05-06 08:22:19,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:19,057 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:19,057 INFO L82 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2021-05-06 08:22:19,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:19,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034245022] [2021-05-06 08:22:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:19,067 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:19,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328397288] [2021-05-06 08:22:19,067 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 [2021-05-06 08:22:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:19,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 08:22:19,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:19,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:19,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:19,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034245022] [2021-05-06 08:22:19,305 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:19,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328397288] [2021-05-06 08:22:19,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328397288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:19,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:19,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:19,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887739148] [2021-05-06 08:22:19,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:19,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:19,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:19,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:19,307 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 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) [2021-05-06 08:22:19,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:19,526 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2021-05-06 08:22:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:19,526 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 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 [2021-05-06 08:22:19,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:19,527 INFO L225 Difference]: With dead ends: 103 [2021-05-06 08:22:19,527 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 08:22:19,528 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:19,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 08:22:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2021-05-06 08:22:19,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:22:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-05-06 08:22:19,533 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2021-05-06 08:22:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:19,533 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-05-06 08:22:19,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 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) [2021-05-06 08:22:19,533 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-05-06 08:22:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:19,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:19,534 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] [2021-05-06 08:22:19,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:22:19,753 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:19,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:19,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2021-05-06 08:22:19,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:19,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254644993] [2021-05-06 08:22:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:19,767 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:19,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829883638] [2021-05-06 08:22:19,767 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 [2021-05-06 08:22:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:19,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:19,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:19,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:22:19,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:19,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254644993] [2021-05-06 08:22:19,918 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:19,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829883638] [2021-05-06 08:22:19,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829883638] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:19,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:19,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 08:22:19,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756839499] [2021-05-06 08:22:19,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:19,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:19,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:19,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:19,919 INFO L87 Difference]: Start difference. First operand 93 states and 122 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) [2021-05-06 08:22:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:20,025 INFO L93 Difference]: Finished difference Result 105 states and 138 transitions. [2021-05-06 08:22:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:20,025 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 [2021-05-06 08:22:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:20,026 INFO L225 Difference]: With dead ends: 105 [2021-05-06 08:22:20,026 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 08:22:20,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:20,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 08:22:20,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 08:22:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 69 states have internal predecessors, (84), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:22:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2021-05-06 08:22:20,031 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 47 [2021-05-06 08:22:20,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:20,031 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2021-05-06 08:22:20,031 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) [2021-05-06 08:22:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2021-05-06 08:22:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:20,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:20,032 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] [2021-05-06 08:22:20,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:20,249 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:20,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:20,249 INFO L82 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2021-05-06 08:22:20,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:20,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915197098] [2021-05-06 08:22:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:20,257 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:20,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316307869] [2021-05-06 08:22:20,258 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 [2021-05-06 08:22:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:20,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:22:20,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:20,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:20,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:20,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915197098] [2021-05-06 08:22:20,406 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:20,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316307869] [2021-05-06 08:22:20,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316307869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:20,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:20,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:22:20,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636861647] [2021-05-06 08:22:20,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:22:20,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:20,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:22:20,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:20,407 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:22:20,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:20,511 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2021-05-06 08:22:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:22:20,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-05-06 08:22:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:20,513 INFO L225 Difference]: With dead ends: 111 [2021-05-06 08:22:20,513 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 08:22:20,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 08:22:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-05-06 08:22:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 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) [2021-05-06 08:22:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2021-05-06 08:22:20,517 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 47 [2021-05-06 08:22:20,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:20,518 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2021-05-06 08:22:20,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:22:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2021-05-06 08:22:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:20,518 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:20,518 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] [2021-05-06 08:22:20,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:20,729 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:20,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2021-05-06 08:22:20,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:20,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583750947] [2021-05-06 08:22:20,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:20,736 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:20,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218892424] [2021-05-06 08:22:20,737 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 [2021-05-06 08:22:20,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:20,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:20,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:22:20,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:20,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:20,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:20,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583750947] [2021-05-06 08:22:20,872 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:20,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218892424] [2021-05-06 08:22:20,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218892424] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:20,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:20,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:20,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607149040] [2021-05-06 08:22:20,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:20,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:20,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:20,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:20,873 INFO L87 Difference]: Start difference. First operand 107 states and 139 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) [2021-05-06 08:22:20,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:20,935 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2021-05-06 08:22:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:20,935 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 [2021-05-06 08:22:20,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:20,937 INFO L225 Difference]: With dead ends: 110 [2021-05-06 08:22:20,937 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 08:22:20,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:20,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 08:22:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-05-06 08:22:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:22:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-05-06 08:22:20,949 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 47 [2021-05-06 08:22:20,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:20,949 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-05-06 08:22:20,949 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) [2021-05-06 08:22:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-05-06 08:22:20,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:22:20,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:20,951 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] [2021-05-06 08:22:21,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:22:21,170 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:21,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:21,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2021-05-06 08:22:21,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:21,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253732215] [2021-05-06 08:22:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:21,178 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:21,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259858240] [2021-05-06 08:22:21,179 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 [2021-05-06 08:22:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:21,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:21,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:21,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 08:22:21,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:21,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253732215] [2021-05-06 08:22:21,314 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:21,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259858240] [2021-05-06 08:22:21,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259858240] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:21,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:21,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:21,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094880462] [2021-05-06 08:22:21,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:21,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:21,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:21,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:21,316 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:22:21,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:21,348 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2021-05-06 08:22:21,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:22:21,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-06 08:22:21,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:21,350 INFO L225 Difference]: With dead ends: 128 [2021-05-06 08:22:21,350 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 08:22:21,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:21,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 08:22:21,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2021-05-06 08:22:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 70 states have internal predecessors, (75), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 08:22:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2021-05-06 08:22:21,358 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 52 [2021-05-06 08:22:21,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:21,360 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2021-05-06 08:22:21,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:22:21,360 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2021-05-06 08:22:21,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:22:21,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:21,363 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] [2021-05-06 08:22:21,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:21,565 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:21,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:21,566 INFO L82 PathProgramCache]: Analyzing trace with hash 846041443, now seen corresponding path program 1 times [2021-05-06 08:22:21,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:21,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203717130] [2021-05-06 08:22:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:21,579 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:21,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014162740] [2021-05-06 08:22:21,579 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 [2021-05-06 08:22:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:21,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:22:21,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:21,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:22:21,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:21,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203717130] [2021-05-06 08:22:21,746 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:21,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014162740] [2021-05-06 08:22:21,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014162740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:21,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:21,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:21,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491064781] [2021-05-06 08:22:21,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:21,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:21,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:21,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:21,748 INFO L87 Difference]: Start difference. First operand 114 states and 151 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:21,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:21,948 INFO L93 Difference]: Finished difference Result 164 states and 229 transitions. [2021-05-06 08:22:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:21,948 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2021-05-06 08:22:21,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:21,950 INFO L225 Difference]: With dead ends: 164 [2021-05-06 08:22:21,950 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 08:22:21,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:21,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 08:22:21,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 92. [2021-05-06 08:22:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:22:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2021-05-06 08:22:21,956 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 52 [2021-05-06 08:22:21,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:21,956 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2021-05-06 08:22:21,956 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2021-05-06 08:22:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 08:22:21,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:21,957 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] [2021-05-06 08:22:22,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:22,174 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:22,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:22,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2021-05-06 08:22:22,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:22,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361535874] [2021-05-06 08:22:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:22,180 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:22,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325003216] [2021-05-06 08:22:22,181 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 [2021-05-06 08:22:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:22,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 08:22:22,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:22,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 08:22:22,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:22,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361535874] [2021-05-06 08:22:22,521 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:22,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325003216] [2021-05-06 08:22:22,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325003216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:22,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:22,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:22,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712946343] [2021-05-06 08:22:22,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:22,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:22,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:22,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:22,522 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:22,860 INFO L93 Difference]: Finished difference Result 176 states and 241 transitions. [2021-05-06 08:22:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:22,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-06 08:22:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:22,862 INFO L225 Difference]: With dead ends: 176 [2021-05-06 08:22:22,862 INFO L226 Difference]: Without dead ends: 175 [2021-05-06 08:22:22,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-06 08:22:22,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-05-06 08:22:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 95 states have (on average 1.168421052631579) internal successors, (111), 102 states have internal predecessors, (111), 63 states have call successors, (63), 13 states have call predecessors, (63), 12 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 08:22:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 235 transitions. [2021-05-06 08:22:22,868 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 235 transitions. Word has length 64 [2021-05-06 08:22:22,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:22,868 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 235 transitions. [2021-05-06 08:22:22,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:22,868 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 235 transitions. [2021-05-06 08:22:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:22:22,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:22,869 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] [2021-05-06 08:22:23,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:22:23,085 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1523533001, now seen corresponding path program 2 times [2021-05-06 08:22:23,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:23,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760849585] [2021-05-06 08:22:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:23,091 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:23,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577273915] [2021-05-06 08:22:23,092 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 [2021-05-06 08:22:23,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:23,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:23,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:22:23,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:23,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:22:23,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:23,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760849585] [2021-05-06 08:22:23,262 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:23,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577273915] [2021-05-06 08:22:23,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577273915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:23,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:23,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:23,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298412014] [2021-05-06 08:22:23,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:23,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:23,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:23,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:23,263 INFO L87 Difference]: Start difference. First operand 171 states and 235 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) [2021-05-06 08:22:23,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:23,492 INFO L93 Difference]: Finished difference Result 281 states and 417 transitions. [2021-05-06 08:22:23,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:23,493 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 [2021-05-06 08:22:23,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:23,495 INFO L225 Difference]: With dead ends: 281 [2021-05-06 08:22:23,495 INFO L226 Difference]: Without dead ends: 281 [2021-05-06 08:22:23,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:23,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-06 08:22:23,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 196. [2021-05-06 08:22:23,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 118 states have internal predecessors, (134), 71 states have call successors, (71), 13 states have call predecessors, (71), 12 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 08:22:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 274 transitions. [2021-05-06 08:22:23,503 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 274 transitions. Word has length 69 [2021-05-06 08:22:23,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:23,503 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 274 transitions. [2021-05-06 08:22:23,503 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) [2021-05-06 08:22:23,503 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 274 transitions. [2021-05-06 08:22:23,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:22:23,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:23,504 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] [2021-05-06 08:22:23,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:22:23,723 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:23,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:23,723 INFO L82 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2021-05-06 08:22:23,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:23,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128917916] [2021-05-06 08:22:23,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:23,729 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:23,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609683441] [2021-05-06 08:22:23,729 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 [2021-05-06 08:22:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:23,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:22:23,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:23,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-06 08:22:23,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:23,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128917916] [2021-05-06 08:22:23,917 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:23,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609683441] [2021-05-06 08:22:23,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609683441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:23,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:23,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:22:23,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039096481] [2021-05-06 08:22:23,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:22:23,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:23,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:22:23,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:23,918 INFO L87 Difference]: Start difference. First operand 196 states and 274 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) [2021-05-06 08:22:24,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:24,100 INFO L93 Difference]: Finished difference Result 233 states and 328 transitions. [2021-05-06 08:22:24,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:22:24,100 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 [2021-05-06 08:22:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:24,101 INFO L225 Difference]: With dead ends: 233 [2021-05-06 08:22:24,102 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 08:22:24,102 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:24,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 08:22:24,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2021-05-06 08:22:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 123 states have (on average 1.1951219512195121) internal successors, (147), 130 states have internal predecessors, (147), 83 states have call successors, (83), 15 states have call predecessors, (83), 14 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 08:22:24,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 311 transitions. [2021-05-06 08:22:24,109 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 311 transitions. Word has length 74 [2021-05-06 08:22:24,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:24,109 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 311 transitions. [2021-05-06 08:22:24,109 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) [2021-05-06 08:22:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 311 transitions. [2021-05-06 08:22:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 08:22:24,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:24,110 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] [2021-05-06 08:22:24,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:22:24,325 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:24,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2021-05-06 08:22:24,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:24,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450163404] [2021-05-06 08:22:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:24,331 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:24,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161013679] [2021-05-06 08:22:24,331 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 [2021-05-06 08:22:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:24,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:24,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:24,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-06 08:22:24,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:24,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450163404] [2021-05-06 08:22:24,505 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:24,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161013679] [2021-05-06 08:22:24,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161013679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:24,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:24,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:24,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334818377] [2021-05-06 08:22:24,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:24,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:24,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:24,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:24,506 INFO L87 Difference]: Start difference. First operand 221 states and 311 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:24,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:24,579 INFO L93 Difference]: Finished difference Result 233 states and 320 transitions. [2021-05-06 08:22:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:22:24,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2021-05-06 08:22:24,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:24,581 INFO L225 Difference]: With dead ends: 233 [2021-05-06 08:22:24,581 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 08:22:24,583 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 08:22:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-05-06 08:22:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 139 states have internal predecessors, (156), 83 states have call successors, (83), 18 states have call predecessors, (83), 17 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 08:22:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 320 transitions. [2021-05-06 08:22:24,592 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 320 transitions. Word has length 72 [2021-05-06 08:22:24,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:24,593 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 320 transitions. [2021-05-06 08:22:24,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:24,593 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 320 transitions. [2021-05-06 08:22:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:24,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:24,595 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] [2021-05-06 08:22:24,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:24,809 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:24,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:24,809 INFO L82 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2021-05-06 08:22:24,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:24,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643386325] [2021-05-06 08:22:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:24,822 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:24,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662523598] [2021-05-06 08:22:24,822 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 [2021-05-06 08:22:24,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:24,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:24,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 08:22:24,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:24,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:22:24,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:24,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643386325] [2021-05-06 08:22:24,980 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:24,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662523598] [2021-05-06 08:22:24,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662523598] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:24,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:24,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:24,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029367241] [2021-05-06 08:22:24,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:24,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:24,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:24,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:24,981 INFO L87 Difference]: Start difference. First operand 233 states and 320 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) [2021-05-06 08:22:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:25,016 INFO L93 Difference]: Finished difference Result 232 states and 304 transitions. [2021-05-06 08:22:25,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:25,017 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 [2021-05-06 08:22:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:25,018 INFO L225 Difference]: With dead ends: 232 [2021-05-06 08:22:25,018 INFO L226 Difference]: Without dead ends: 232 [2021-05-06 08:22:25,018 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:25,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-06 08:22:25,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 216. [2021-05-06 08:22:25,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 127 states have (on average 1.1653543307086613) internal successors, (148), 130 states have internal predecessors, (148), 71 states have call successors, (71), 18 states have call predecessors, (71), 17 states have return successors, (69), 67 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 08:22:25,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 288 transitions. [2021-05-06 08:22:25,027 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 288 transitions. Word has length 77 [2021-05-06 08:22:25,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:25,027 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 288 transitions. [2021-05-06 08:22:25,027 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) [2021-05-06 08:22:25,027 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 288 transitions. [2021-05-06 08:22:25,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:25,028 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:25,028 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] [2021-05-06 08:22:25,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:22:25,241 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:25,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1813106047, now seen corresponding path program 3 times [2021-05-06 08:22:25,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:25,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872465473] [2021-05-06 08:22:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:25,247 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:25,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826156351] [2021-05-06 08:22:25,247 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 [2021-05-06 08:22:25,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:22:25,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:25,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:22:25,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:25,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:22:25,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:25,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872465473] [2021-05-06 08:22:25,392 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:25,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826156351] [2021-05-06 08:22:25,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826156351] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:25,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:25,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:25,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638003148] [2021-05-06 08:22:25,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:25,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:25,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:25,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:25,393 INFO L87 Difference]: Start difference. First operand 216 states and 288 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:22:25,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:25,426 INFO L93 Difference]: Finished difference Result 236 states and 317 transitions. [2021-05-06 08:22:25,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:22:25,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-06 08:22:25,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:25,428 INFO L225 Difference]: With dead ends: 236 [2021-05-06 08:22:25,428 INFO L226 Difference]: Without dead ends: 236 [2021-05-06 08:22:25,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:25,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-06 08:22:25,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2021-05-06 08:22:25,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 134 states have (on average 1.171641791044776) internal successors, (157), 137 states have internal predecessors, (157), 79 states have call successors, (79), 19 states have call predecessors, (79), 18 states have return successors, (77), 75 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-06 08:22:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 313 transitions. [2021-05-06 08:22:25,434 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 313 transitions. Word has length 77 [2021-05-06 08:22:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:25,434 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 313 transitions. [2021-05-06 08:22:25,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:22:25,434 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 313 transitions. [2021-05-06 08:22:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:22:25,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:25,435 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 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] [2021-05-06 08:22:25,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:22:25,648 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:25,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:25,649 INFO L82 PathProgramCache]: Analyzing trace with hash -747783847, now seen corresponding path program 1 times [2021-05-06 08:22:25,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:25,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083026729] [2021-05-06 08:22:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:25,661 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:25,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880528832] [2021-05-06 08:22:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:22:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:25,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:22:25,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:25,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-06 08:22:25,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:25,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083026729] [2021-05-06 08:22:25,900 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:25,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880528832] [2021-05-06 08:22:25,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880528832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:25,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:25,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:25,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136370203] [2021-05-06 08:22:25,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:25,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:25,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:25,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:25,901 INFO L87 Difference]: Start difference. First operand 232 states and 313 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:22:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:26,185 INFO L93 Difference]: Finished difference Result 309 states and 421 transitions. [2021-05-06 08:22:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:26,185 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2021-05-06 08:22:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:26,188 INFO L225 Difference]: With dead ends: 309 [2021-05-06 08:22:26,188 INFO L226 Difference]: Without dead ends: 309 [2021-05-06 08:22:26,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:22:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-06 08:22:26,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 250. [2021-05-06 08:22:26,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 147 states have internal predecessors, (165), 87 states have call successors, (87), 21 states have call predecessors, (87), 20 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2021-05-06 08:22:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 337 transitions. [2021-05-06 08:22:26,195 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 337 transitions. Word has length 79 [2021-05-06 08:22:26,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:26,195 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 337 transitions. [2021-05-06 08:22:26,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:22:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 337 transitions. [2021-05-06 08:22:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:26,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:26,196 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] [2021-05-06 08:22:26,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:22:26,415 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:26,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 4 times [2021-05-06 08:22:26,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:26,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169995491] [2021-05-06 08:22:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:26,425 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:26,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816561929] [2021-05-06 08:22:26,425 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:26,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:26,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:26,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-06 08:22:26,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:26,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 08:22:26,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:26,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169995491] [2021-05-06 08:22:26,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:26,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816561929] [2021-05-06 08:22:26,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816561929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:26,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:26,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:26,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016380442] [2021-05-06 08:22:26,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:26,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:26,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:26,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:26,734 INFO L87 Difference]: Start difference. First operand 250 states and 337 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:22:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:27,125 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2021-05-06 08:22:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:22:27,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 77 [2021-05-06 08:22:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:27,126 INFO L225 Difference]: With dead ends: 315 [2021-05-06 08:22:27,127 INFO L226 Difference]: Without dead ends: 315 [2021-05-06 08:22:27,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-06 08:22:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 297. [2021-05-06 08:22:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 170 states have (on average 1.1647058823529413) internal successors, (198), 175 states have internal predecessors, (198), 103 states have call successors, (103), 24 states have call predecessors, (103), 23 states have return successors, (101), 97 states have call predecessors, (101), 101 states have call successors, (101) [2021-05-06 08:22:27,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 402 transitions. [2021-05-06 08:22:27,135 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 402 transitions. Word has length 77 [2021-05-06 08:22:27,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:27,135 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 402 transitions. [2021-05-06 08:22:27,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:22:27,135 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 402 transitions. [2021-05-06 08:22:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:22:27,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:27,136 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 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, 1, 1] [2021-05-06 08:22:27,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:27,355 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:27,355 INFO L82 PathProgramCache]: Analyzing trace with hash 131640819, now seen corresponding path program 1 times [2021-05-06 08:22:27,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:27,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757692874] [2021-05-06 08:22:27,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:27,361 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:27,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79107780] [2021-05-06 08:22:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:27,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 08:22:27,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:27,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-06 08:22:27,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:27,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757692874] [2021-05-06 08:22:27,800 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:27,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79107780] [2021-05-06 08:22:27,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79107780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:27,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:27,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:27,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608793735] [2021-05-06 08:22:27,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:27,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:27,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:27,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:27,801 INFO L87 Difference]: Start difference. First operand 297 states and 402 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:22:28,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:28,440 INFO L93 Difference]: Finished difference Result 378 states and 518 transitions. [2021-05-06 08:22:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:22:28,440 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2021-05-06 08:22:28,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:28,444 INFO L225 Difference]: With dead ends: 378 [2021-05-06 08:22:28,444 INFO L226 Difference]: Without dead ends: 377 [2021-05-06 08:22:28,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 411.4ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:22:28,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-06 08:22:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 362. [2021-05-06 08:22:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 204 states have (on average 1.1813725490196079) internal successors, (241), 209 states have internal predecessors, (241), 131 states have call successors, (131), 27 states have call predecessors, (131), 26 states have return successors, (129), 125 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-06 08:22:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 501 transitions. [2021-05-06 08:22:28,455 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 501 transitions. Word has length 86 [2021-05-06 08:22:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:28,455 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 501 transitions. [2021-05-06 08:22:28,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:22:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 501 transitions. [2021-05-06 08:22:28,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:22:28,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:28,457 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 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] [2021-05-06 08:22:28,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:28,673 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:28,673 INFO L82 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 2 times [2021-05-06 08:22:28,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:28,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614256455] [2021-05-06 08:22:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:28,678 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:28,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157360636] [2021-05-06 08:22:28,679 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:28,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:28,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:28,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 08:22:28,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:28,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:22:29,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:29,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614256455] [2021-05-06 08:22:29,140 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:29,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157360636] [2021-05-06 08:22:29,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157360636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:29,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:29,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:29,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884859362] [2021-05-06 08:22:29,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:29,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:29,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:29,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:29,141 INFO L87 Difference]: Start difference. First operand 362 states and 501 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:22:29,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:29,822 INFO L93 Difference]: Finished difference Result 452 states and 625 transitions. [2021-05-06 08:22:29,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:29,823 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2021-05-06 08:22:29,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:29,825 INFO L225 Difference]: With dead ends: 452 [2021-05-06 08:22:29,825 INFO L226 Difference]: Without dead ends: 451 [2021-05-06 08:22:29,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:22:29,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-05-06 08:22:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 431. [2021-05-06 08:22:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 241 states have (on average 1.1908713692946058) internal successors, (287), 246 states have internal predecessors, (287), 159 states have call successors, (159), 31 states have call predecessors, (159), 30 states have return successors, (157), 153 states have call predecessors, (157), 157 states have call successors, (157) [2021-05-06 08:22:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 603 transitions. [2021-05-06 08:22:29,835 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 603 transitions. Word has length 91 [2021-05-06 08:22:29,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:29,836 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 603 transitions. [2021-05-06 08:22:29,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:22:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 603 transitions. [2021-05-06 08:22:29,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 08:22:29,836 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:29,837 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:30,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:22:30,041 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:30,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:30,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1005767165, now seen corresponding path program 2 times [2021-05-06 08:22:30,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:30,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624973126] [2021-05-06 08:22:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:30,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:30,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049696640] [2021-05-06 08:22:30,054 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:30,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:30,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:30,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 08:22:30,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:30,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-06 08:22:30,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:30,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624973126] [2021-05-06 08:22:30,331 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:30,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049696640] [2021-05-06 08:22:30,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049696640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:30,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:30,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:30,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537801464] [2021-05-06 08:22:30,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:30,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:30,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:30,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:30,332 INFO L87 Difference]: Start difference. First operand 431 states and 603 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:22:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:30,548 INFO L93 Difference]: Finished difference Result 468 states and 658 transitions. [2021-05-06 08:22:30,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:30,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 96 [2021-05-06 08:22:30,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:30,554 INFO L225 Difference]: With dead ends: 468 [2021-05-06 08:22:30,555 INFO L226 Difference]: Without dead ends: 468 [2021-05-06 08:22:30,556 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:30,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-06 08:22:30,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 452. [2021-05-06 08:22:30,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 249 states have (on average 1.1927710843373494) internal successors, (297), 255 states have internal predecessors, (297), 171 states have call successors, (171), 32 states have call predecessors, (171), 31 states have return successors, (169), 164 states have call predecessors, (169), 169 states have call successors, (169) [2021-05-06 08:22:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 637 transitions. [2021-05-06 08:22:30,568 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 637 transitions. Word has length 96 [2021-05-06 08:22:30,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:30,568 INFO L480 AbstractCegarLoop]: Abstraction has 452 states and 637 transitions. [2021-05-06 08:22:30,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:22:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 637 transitions. [2021-05-06 08:22:30,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 08:22:30,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:30,569 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 08:22:30,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:22:30,785 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:30,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:30,786 INFO L82 PathProgramCache]: Analyzing trace with hash 561452732, now seen corresponding path program 2 times [2021-05-06 08:22:30,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:30,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271132175] [2021-05-06 08:22:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:30,797 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:30,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37466733] [2021-05-06 08:22:30,798 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:30,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:30,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:30,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:22:30,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:30,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-06 08:22:31,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:31,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271132175] [2021-05-06 08:22:31,050 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:31,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37466733] [2021-05-06 08:22:31,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37466733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:31,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:31,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:31,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949978496] [2021-05-06 08:22:31,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:31,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:31,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:31,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:31,052 INFO L87 Difference]: Start difference. First operand 452 states and 637 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:22:31,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:31,416 INFO L93 Difference]: Finished difference Result 533 states and 758 transitions. [2021-05-06 08:22:31,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:22:31,416 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 101 [2021-05-06 08:22:31,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:31,418 INFO L225 Difference]: With dead ends: 533 [2021-05-06 08:22:31,418 INFO L226 Difference]: Without dead ends: 533 [2021-05-06 08:22:31,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:22:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-05-06 08:22:31,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 473. [2021-05-06 08:22:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 257 states have (on average 1.1945525291828794) internal successors, (307), 264 states have internal predecessors, (307), 183 states have call successors, (183), 33 states have call predecessors, (183), 32 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2021-05-06 08:22:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 671 transitions. [2021-05-06 08:22:31,429 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 671 transitions. Word has length 101 [2021-05-06 08:22:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:31,430 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 671 transitions. [2021-05-06 08:22:31,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:22:31,430 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 671 transitions. [2021-05-06 08:22:31,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:22:31,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:31,431 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:31,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:31,641 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:31,641 INFO L82 PathProgramCache]: Analyzing trace with hash 132172733, now seen corresponding path program 1 times [2021-05-06 08:22:31,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:31,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93101772] [2021-05-06 08:22:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:31,646 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:31,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345371317] [2021-05-06 08:22:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:31,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:22:31,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:31,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-05-06 08:22:31,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:31,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93101772] [2021-05-06 08:22:31,886 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:31,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345371317] [2021-05-06 08:22:31,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345371317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:31,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:31,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:22:31,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406145804] [2021-05-06 08:22:31,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:22:31,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:31,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:22:31,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:31,888 INFO L87 Difference]: Start difference. First operand 473 states and 671 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-05-06 08:22:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:32,139 INFO L93 Difference]: Finished difference Result 557 states and 809 transitions. [2021-05-06 08:22:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:32,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 104 [2021-05-06 08:22:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:32,141 INFO L225 Difference]: With dead ends: 557 [2021-05-06 08:22:32,141 INFO L226 Difference]: Without dead ends: 557 [2021-05-06 08:22:32,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:32,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-05-06 08:22:32,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 527. [2021-05-06 08:22:32,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 270 states have (on average 1.1851851851851851) internal successors, (320), 287 states have internal predecessors, (320), 223 states have call successors, (223), 34 states have call predecessors, (223), 33 states have return successors, (221), 205 states have call predecessors, (221), 221 states have call successors, (221) [2021-05-06 08:22:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 764 transitions. [2021-05-06 08:22:32,153 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 764 transitions. Word has length 104 [2021-05-06 08:22:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:32,153 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 764 transitions. [2021-05-06 08:22:32,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-05-06 08:22:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 764 transitions. [2021-05-06 08:22:32,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 08:22:32,154 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:32,154 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 08:22:32,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:22:32,370 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:32,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:32,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1063397065, now seen corresponding path program 5 times [2021-05-06 08:22:32,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:32,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936212974] [2021-05-06 08:22:32,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:32,379 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:32,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251851053] [2021-05-06 08:22:32,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:32,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:22:32,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:32,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-06 08:22:32,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:32,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 49 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-06 08:22:32,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:32,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936212974] [2021-05-06 08:22:32,992 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:32,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251851053] [2021-05-06 08:22:32,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251851053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:32,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:32,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:22:32,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196551419] [2021-05-06 08:22:32,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:22:32,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:32,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:22:32,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:32,995 INFO L87 Difference]: Start difference. First operand 527 states and 764 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:22:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:33,846 INFO L93 Difference]: Finished difference Result 606 states and 868 transitions. [2021-05-06 08:22:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:22:33,846 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 102 [2021-05-06 08:22:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:33,849 INFO L225 Difference]: With dead ends: 606 [2021-05-06 08:22:33,849 INFO L226 Difference]: Without dead ends: 606 [2021-05-06 08:22:33,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 548.1ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:22:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-05-06 08:22:33,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 535. [2021-05-06 08:22:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 276 states have (on average 1.181159420289855) internal successors, (326), 293 states have internal predecessors, (326), 223 states have call successors, (223), 36 states have call predecessors, (223), 35 states have return successors, (221), 205 states have call predecessors, (221), 221 states have call successors, (221) [2021-05-06 08:22:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 770 transitions. [2021-05-06 08:22:33,860 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 770 transitions. Word has length 102 [2021-05-06 08:22:33,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:33,860 INFO L480 AbstractCegarLoop]: Abstraction has 535 states and 770 transitions. [2021-05-06 08:22:33,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:22:33,861 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 770 transitions. [2021-05-06 08:22:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 08:22:33,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:33,862 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 08:22:34,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:34,079 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:34,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:34,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1716502634, now seen corresponding path program 3 times [2021-05-06 08:22:34,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:34,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230794048] [2021-05-06 08:22:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:34,084 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:34,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438949135] [2021-05-06 08:22:34,084 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:34,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:22:34,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:34,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-06 08:22:34,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:34,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 58 proven. 14 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-05-06 08:22:34,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:34,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230794048] [2021-05-06 08:22:34,611 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:34,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438949135] [2021-05-06 08:22:34,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438949135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:34,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:34,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:34,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268207129] [2021-05-06 08:22:34,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:34,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:34,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:34,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:34,615 INFO L87 Difference]: Start difference. First operand 535 states and 770 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:22:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:35,478 INFO L93 Difference]: Finished difference Result 634 states and 916 transitions. [2021-05-06 08:22:35,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:35,478 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 108 [2021-05-06 08:22:35,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:35,481 INFO L225 Difference]: With dead ends: 634 [2021-05-06 08:22:35,481 INFO L226 Difference]: Without dead ends: 633 [2021-05-06 08:22:35,481 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 408.4ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:22:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-05-06 08:22:35,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 615. [2021-05-06 08:22:35,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 313 states have (on average 1.1884984025559104) internal successors, (372), 333 states have internal predecessors, (372), 263 states have call successors, (263), 39 states have call predecessors, (263), 38 states have return successors, (261), 242 states have call predecessors, (261), 261 states have call successors, (261) [2021-05-06 08:22:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 896 transitions. [2021-05-06 08:22:35,495 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 896 transitions. Word has length 108 [2021-05-06 08:22:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:35,495 INFO L480 AbstractCegarLoop]: Abstraction has 615 states and 896 transitions. [2021-05-06 08:22:35,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:22:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 896 transitions. [2021-05-06 08:22:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:22:35,496 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:35,496 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:35,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:22:35,709 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:35,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:35,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1501596464, now seen corresponding path program 6 times [2021-05-06 08:22:35,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:35,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385968069] [2021-05-06 08:22:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:35,714 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:35,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715294987] [2021-05-06 08:22:35,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:35,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:22:35,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:35,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 08:22:35,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:35,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 91 proven. 35 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-06 08:22:36,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:36,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385968069] [2021-05-06 08:22:36,016 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:36,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715294987] [2021-05-06 08:22:36,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715294987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:36,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:36,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:36,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25732781] [2021-05-06 08:22:36,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:36,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:36,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:36,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:36,019 INFO L87 Difference]: Start difference. First operand 615 states and 896 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:22:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:36,795 INFO L93 Difference]: Finished difference Result 635 states and 916 transitions. [2021-05-06 08:22:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:22:36,795 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 107 [2021-05-06 08:22:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:36,797 INFO L225 Difference]: With dead ends: 635 [2021-05-06 08:22:36,797 INFO L226 Difference]: Without dead ends: 635 [2021-05-06 08:22:36,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-05-06 08:22:36,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 628. [2021-05-06 08:22:36,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 322 states have (on average 1.1832298136645962) internal successors, (381), 343 states have internal predecessors, (381), 265 states have call successors, (265), 41 states have call predecessors, (265), 40 states have return successors, (263), 243 states have call predecessors, (263), 263 states have call successors, (263) [2021-05-06 08:22:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 909 transitions. [2021-05-06 08:22:36,811 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 909 transitions. Word has length 107 [2021-05-06 08:22:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:36,811 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 909 transitions. [2021-05-06 08:22:36,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:22:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 909 transitions. [2021-05-06 08:22:36,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:22:36,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:36,812 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:37,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:22:37,029 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:37,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1112008279, now seen corresponding path program 4 times [2021-05-06 08:22:37,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:37,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212783606] [2021-05-06 08:22:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:37,035 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:37,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606137262] [2021-05-06 08:22:37,035 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:37,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:37,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:37,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-06 08:22:37,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:37,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,724 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-06 08:22:37,972 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-06 08:22:38,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 95 proven. 61 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-05-06 08:22:38,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:38,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212783606] [2021-05-06 08:22:38,462 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:38,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606137262] [2021-05-06 08:22:38,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606137262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:38,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:38,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:22:38,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142099141] [2021-05-06 08:22:38,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 08:22:38,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:38,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 08:22:38,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:22:38,464 INFO L87 Difference]: Start difference. First operand 628 states and 909 transitions. Second operand has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:22:39,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:39,290 INFO L93 Difference]: Finished difference Result 674 states and 970 transitions. [2021-05-06 08:22:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:22:39,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2021-05-06 08:22:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:39,291 INFO L225 Difference]: With dead ends: 674 [2021-05-06 08:22:39,291 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:22:39,291 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1231.3ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:22:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:22:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:22:39,291 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) [2021-05-06 08:22:39,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:22:39,292 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 111 [2021-05-06 08:22:39,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:39,292 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:22:39,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:22:39,292 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:22:39,292 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:22:39,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:22:39,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:39 BasicIcfg [2021-05-06 08:22:39,500 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:22:39,500 INFO L168 Benchmark]: Toolchain (without parser) took 23914.54 ms. Allocated memory was 204.5 MB in the beginning and 400.6 MB in the end (delta: 196.1 MB). Free memory was 170.3 MB in the beginning and 251.4 MB in the end (delta: -81.0 MB). Peak memory consumption was 116.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:39,500 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 204.5 MB. Free memory is still 187.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:22:39,500 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.62 ms. Allocated memory is still 204.5 MB. Free memory was 170.1 MB in the beginning and 187.3 MB in the end (delta: -17.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:39,500 INFO L168 Benchmark]: Boogie Preprocessor took 28.55 ms. Allocated memory is still 204.5 MB. Free memory was 187.3 MB in the beginning and 185.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:39,500 INFO L168 Benchmark]: RCFGBuilder took 358.18 ms. Allocated memory is still 204.5 MB. Free memory was 185.8 MB in the beginning and 168.8 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:39,500 INFO L168 Benchmark]: IcfgTransformer took 22.39 ms. Allocated memory is still 204.5 MB. Free memory was 168.4 MB in the beginning and 167.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:39,501 INFO L168 Benchmark]: TraceAbstraction took 23268.33 ms. Allocated memory was 204.5 MB in the beginning and 400.6 MB in the end (delta: 196.1 MB). Free memory was 166.9 MB in the beginning and 251.4 MB in the end (delta: -84.5 MB). Peak memory consumption was 111.9 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:39,501 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 204.5 MB. Free memory is still 187.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 230.62 ms. Allocated memory is still 204.5 MB. Free memory was 170.1 MB in the beginning and 187.3 MB in the end (delta: -17.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.55 ms. Allocated memory is still 204.5 MB. Free memory was 187.3 MB in the beginning and 185.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 358.18 ms. Allocated memory is still 204.5 MB. Free memory was 185.8 MB in the beginning and 168.8 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 22.39 ms. Allocated memory is still 204.5 MB. Free memory was 168.4 MB in the beginning and 167.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 23268.33 ms. Allocated memory was 204.5 MB in the beginning and 400.6 MB in the end (delta: 196.1 MB). Free memory was 166.9 MB in the beginning and 251.4 MB in the end (delta: -84.5 MB). Peak memory consumption was 111.9 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 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23234.6ms, OverallIterations: 28, TraceHistogramMax: 13, EmptinessCheckTime: 35.5ms, AutomataDifference: 8533.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1412 SDtfs, 1311 SDslu, 7768 SDs, 0 SdLazy, 7765 SolverSat, 1178 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5361.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2089 GetRequests, 1689 SyntacticMatches, 8 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 5020.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=628occurred in iteration=27, InterpolantAutomatonStates: 318, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 235.4ms AutomataMinimizationTime, 28 MinimizatonAttempts, 602 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 216.0ms SsaConstructionTime, 799.3ms SatisfiabilityAnalysisTime, 6566.9ms InterpolantComputationTime, 1967 NumberOfCodeBlocks, 1833 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 1939 ConstructedInterpolants, 0 QuantifiedInterpolants, 10536 SizeOfPredicates, 170 NumberOfNonLiveVariables, 5825 ConjunctsInSsa, 822 ConjunctsInUnsatCore, 28 InterpolantComputations, 7 PerfectInterpolantSequences, 3064/3439 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...