/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/egcd-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:18:32,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:18:32,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:18:32,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:18:32,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:18:32,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:18:32,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:18:32,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:18:32,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:18:32,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:18:32,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:18:32,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:18:32,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:18:32,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:18:32,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:18:32,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:18:32,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:18:32,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:18:32,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:18:32,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:18:32,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:18:32,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:18:32,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:18:32,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:18:32,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:18:32,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:18:32,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:18:32,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:18:32,336 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:18:32,349 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:18:32,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:18:32,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:18:32,351 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:18:32,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:18:32,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:18:32,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:18:32,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:18:32,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:18:32,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:18:32,352 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:18:32,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:18:32,353 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:18:32,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:18:32,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:18:32,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:18:32,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:18:32,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:18:32,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:18:32,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:18:32,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:18:32,355 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:18:32,355 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:18:32,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:18:32,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:18:32,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:18:32,675 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:18:32,675 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:18:32,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c [2021-05-02 20:18:32,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3d6f01af/c8ad48b8d80443e89c52c009d1eb6b4d/FLAGb0840e754 [2021-05-02 20:18:33,135 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:18:33,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c [2021-05-02 20:18:33,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3d6f01af/c8ad48b8d80443e89c52c009d1eb6b4d/FLAGb0840e754 [2021-05-02 20:18:33,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3d6f01af/c8ad48b8d80443e89c52c009d1eb6b4d [2021-05-02 20:18:33,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:18:33,209 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:18:33,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:18:33,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:18:33,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:18:33,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:18:33" (1/1) ... [2021-05-02 20:18:33,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3148b855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:33, skipping insertion in model container [2021-05-02 20:18:33,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:18:33" (1/1) ... [2021-05-02 20:18:33,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:18:33,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:18:33,502 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/egcd-ll_valuebound10.c[489,502] [2021-05-02 20:18:33,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:18:33,534 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:18:33,586 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/egcd-ll_valuebound10.c[489,502] [2021-05-02 20:18:33,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:18:33,625 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:18:33,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:33 WrapperNode [2021-05-02 20:18:33,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:18:33,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:18:33,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:18:33,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:18:33,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:33" (1/1) ... [2021-05-02 20:18:33,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:33" (1/1) ... [2021-05-02 20:18:33,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:33" (1/1) ... [2021-05-02 20:18:33,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:33" (1/1) ... [2021-05-02 20:18:33,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:33" (1/1) ... [2021-05-02 20:18:33,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:33" (1/1) ... [2021-05-02 20:18:33,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:33" (1/1) ... [2021-05-02 20:18:33,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:18:33,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:18:33,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:18:33,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:18:33,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:18:33,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:18:33,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:18:33,766 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:18:33,766 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:18:33,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:18:33,767 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:18:33,767 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:18:33,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:18:33,767 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:18:33,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:18:33,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:18:33,768 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:18:33,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:18:33,768 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:18:33,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:18:33,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:18:33,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:18:33,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:18:33,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:18:33,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:18:34,019 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:18:34,019 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:18:34,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:34 BoogieIcfgContainer [2021-05-02 20:18:34,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:18:34,021 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:18:34,021 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:18:34,021 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:18:34,023 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:34" (1/1) ... [2021-05-02 20:18:34,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:18:34 BasicIcfg [2021-05-02 20:18:34,052 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:18:34,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:18:34,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:18:34,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:18:34,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:18:33" (1/4) ... [2021-05-02 20:18:34,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be341f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:18:34, skipping insertion in model container [2021-05-02 20:18:34,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:33" (2/4) ... [2021-05-02 20:18:34,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be341f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:18:34, skipping insertion in model container [2021-05-02 20:18:34,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:34" (3/4) ... [2021-05-02 20:18:34,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be341f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:18:34, skipping insertion in model container [2021-05-02 20:18:34,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:18:34" (4/4) ... [2021-05-02 20:18:34,063 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound10.cJordan [2021-05-02 20:18:34,067 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:18:34,070 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:18:34,081 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:18:34,099 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:18:34,099 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:18:34,099 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:18:34,099 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:18:34,099 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:18:34,099 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:18:34,100 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:18:34,100 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:18:34,117 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:18:34,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:18:34,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:34,123 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:34,124 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:34,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:34,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1381881312, now seen corresponding path program 1 times [2021-05-02 20:18:34,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:34,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080735834] [2021-05-02 20:18:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:34,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:18:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:34,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:18:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:34,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:18:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:34,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:18:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:34,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:18:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:18:34,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:34,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080735834] [2021-05-02 20:18:34,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080735834] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:34,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:34,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:18:34,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003800993] [2021-05-02 20:18:34,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:18:34,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:34,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:18:34,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:18:34,520 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:18:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:34,715 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-02 20:18:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:18:34,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:18:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:34,721 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:18:34,721 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:18:34,722 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:18:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:18:34,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:18:34,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:18:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 20:18:34,762 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-02 20:18:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:34,763 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 20:18:34,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:18:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 20:18:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:18:34,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:34,764 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:34,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:18:34,769 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:34,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1975235811, now seen corresponding path program 1 times [2021-05-02 20:18:34,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:34,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316513976] [2021-05-02 20:18:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:34,799 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:34,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402844984] [2021-05-02 20:18:34,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:34,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:18:34,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:34,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:18:35,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:35,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316513976] [2021-05-02 20:18:35,144 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:35,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402844984] [2021-05-02 20:18:35,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402844984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:35,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:35,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:18:35,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355967343] [2021-05-02 20:18:35,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:18:35,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:35,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:18:35,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:18:35,150 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:18:35,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:35,295 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-05-02 20:18:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:18:35,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-02 20:18:35,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:35,297 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:18:35,297 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:18:35,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:18:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 20:18:35,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:18:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-02 20:18:35,305 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-02 20:18:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:35,305 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-02 20:18:35,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:18:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-02 20:18:35,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:18:35,306 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:35,306 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] [2021-05-02 20:18:35,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:18:35,522 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:35,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:35,523 INFO L82 PathProgramCache]: Analyzing trace with hash -759782395, now seen corresponding path program 1 times [2021-05-02 20:18:35,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:35,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283586096] [2021-05-02 20:18:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:35,564 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:35,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735950661] [2021-05-02 20:18:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:35,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:18:35,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:35,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:18:35,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:35,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283586096] [2021-05-02 20:18:35,915 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:35,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735950661] [2021-05-02 20:18:35,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735950661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:35,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:35,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:18:35,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412036247] [2021-05-02 20:18:35,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:18:35,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:35,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:18:35,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:35,917 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:18:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:36,044 INFO L93 Difference]: Finished difference Result 68 states and 100 transitions. [2021-05-02 20:18:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:18:36,044 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-05-02 20:18:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:36,049 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:18:36,049 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:18:36,050 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:18:36,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-02 20:18:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 20:18:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-02 20:18:36,071 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-02 20:18:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:36,071 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-02 20:18:36,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:18:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-02 20:18:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:18:36,073 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:36,073 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] [2021-05-02 20:18:36,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:36,290 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:36,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:36,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1840397536, now seen corresponding path program 1 times [2021-05-02 20:18:36,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:36,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369150102] [2021-05-02 20:18:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:36,310 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:36,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947517456] [2021-05-02 20:18:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:36,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:18:36,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:36,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:18:36,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:36,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369150102] [2021-05-02 20:18:36,816 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:36,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947517456] [2021-05-02 20:18:36,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947517456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:36,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:36,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:18:36,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828921134] [2021-05-02 20:18:36,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:18:36,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:36,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:18:36,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:36,817 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:18:36,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:36,941 INFO L93 Difference]: Finished difference Result 66 states and 91 transitions. [2021-05-02 20:18:36,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:18:36,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2021-05-02 20:18:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:36,946 INFO L225 Difference]: With dead ends: 66 [2021-05-02 20:18:36,947 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 20:18:36,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 20:18:36,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 20:18:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:18:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-02 20:18:36,960 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-02 20:18:36,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:36,962 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-02 20:18:36,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:18:36,962 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-02 20:18:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:18:36,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:36,966 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] [2021-05-02 20:18:37,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:37,184 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:37,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:37,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1590647429, now seen corresponding path program 1 times [2021-05-02 20:18:37,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:37,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687353015] [2021-05-02 20:18:37,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:37,199 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:37,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703655032] [2021-05-02 20:18:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:37,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:18:37,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:18:37,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:37,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687353015] [2021-05-02 20:18:37,400 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:37,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703655032] [2021-05-02 20:18:37,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703655032] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:37,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:37,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:18:37,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413113182] [2021-05-02 20:18:37,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:18:37,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:37,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:18:37,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:18:37,401 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 20:18:37,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:37,439 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-05-02 20:18:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:18:37,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-02 20:18:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:37,447 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:18:37,447 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:18:37,448 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:18:37,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:18:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 20:18:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:18:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-02 20:18:37,451 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-02 20:18:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:37,451 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-02 20:18:37,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 20:18:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-02 20:18:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 20:18:37,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:37,452 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1] [2021-05-02 20:18:37,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:37,665 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:37,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:37,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1766531305, now seen corresponding path program 1 times [2021-05-02 20:18:37,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:37,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089551496] [2021-05-02 20:18:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:37,699 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:37,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377051436] [2021-05-02 20:18:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:37,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:18:37,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:37,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 20:18:37,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:37,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089551496] [2021-05-02 20:18:37,985 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:37,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377051436] [2021-05-02 20:18:37,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377051436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:37,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:37,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:18:37,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172240611] [2021-05-02 20:18:37,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:18:37,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:37,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:18:37,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:18:37,989 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:18:38,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:38,106 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-02 20:18:38,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:18:38,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-02 20:18:38,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:38,108 INFO L225 Difference]: With dead ends: 82 [2021-05-02 20:18:38,108 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 20:18:38,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:38,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 20:18:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-02 20:18:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:18:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 20:18:38,112 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-02 20:18:38,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:38,112 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 20:18:38,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:18:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 20:18:38,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:18:38,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:38,113 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1] [2021-05-02 20:18:38,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:18:38,325 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:38,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:38,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1046589490, now seen corresponding path program 1 times [2021-05-02 20:18:38,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:38,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690997600] [2021-05-02 20:18:38,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:38,359 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:38,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079236736] [2021-05-02 20:18:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:38,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:18:38,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:38,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:38,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:18:38,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:38,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690997600] [2021-05-02 20:18:38,595 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:38,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079236736] [2021-05-02 20:18:38,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079236736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:38,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:38,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:18:38,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467882965] [2021-05-02 20:18:38,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:18:38,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:38,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:18:38,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:38,598 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:18:38,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:38,713 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2021-05-02 20:18:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:18:38,714 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-02 20:18:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:38,718 INFO L225 Difference]: With dead ends: 86 [2021-05-02 20:18:38,718 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 20:18:38,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:38,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 20:18:38,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 20:18:38,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:18:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-02 20:18:38,741 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-02 20:18:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:38,742 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-02 20:18:38,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:18:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-02 20:18:38,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 20:18:38,748 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:38,749 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2021-05-02 20:18:38,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:38,961 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:38,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:38,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2126309122, now seen corresponding path program 1 times [2021-05-02 20:18:38,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:38,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047955357] [2021-05-02 20:18:38,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:38,996 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:38,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990908247] [2021-05-02 20:18:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:39,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:18:39,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:39,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:18:39,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:39,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047955357] [2021-05-02 20:18:39,473 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:39,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990908247] [2021-05-02 20:18:39,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990908247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:39,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:39,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:18:39,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271518160] [2021-05-02 20:18:39,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:18:39,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:39,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:18:39,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:39,474 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:18:39,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:39,910 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-02 20:18:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:18:39,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2021-05-02 20:18:39,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:39,914 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:18:39,914 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:18:39,914 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:18:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:18:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-02 20:18:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 20:18:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-02 20:18:39,938 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-02 20:18:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:39,940 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-02 20:18:39,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:18:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-02 20:18:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:18:39,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:39,941 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2021-05-02 20:18:40,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:40,153 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:40,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:40,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1746772058, now seen corresponding path program 2 times [2021-05-02 20:18:40,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:40,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593098495] [2021-05-02 20:18:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:40,183 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:40,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829245929] [2021-05-02 20:18:40,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:40,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:40,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:40,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 20:18:40,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:40,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:18:40,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:40,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593098495] [2021-05-02 20:18:40,446 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:40,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829245929] [2021-05-02 20:18:40,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829245929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:40,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:40,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:18:40,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32148047] [2021-05-02 20:18:40,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:18:40,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:40,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:18:40,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:40,449 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:18:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:40,585 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-05-02 20:18:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:18:40,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 61 [2021-05-02 20:18:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:40,587 INFO L225 Difference]: With dead ends: 135 [2021-05-02 20:18:40,587 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 20:18:40,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 20:18:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-02 20:18:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 20:18:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-02 20:18:40,592 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-02 20:18:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:40,592 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-02 20:18:40,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:18:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-02 20:18:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:18:40,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:40,593 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:40,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:18:40,797 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:40,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:40,797 INFO L82 PathProgramCache]: Analyzing trace with hash -296466288, now seen corresponding path program 1 times [2021-05-02 20:18:40,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:40,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75374448] [2021-05-02 20:18:40,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:40,805 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:40,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167267985] [2021-05-02 20:18:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:40,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:18:40,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:40,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 20:18:41,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:41,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75374448] [2021-05-02 20:18:41,019 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:41,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167267985] [2021-05-02 20:18:41,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167267985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:41,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:41,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:18:41,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758464161] [2021-05-02 20:18:41,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:18:41,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:41,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:18:41,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:41,020 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:18:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:41,178 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2021-05-02 20:18:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:18:41,179 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 20:18:41,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:41,180 INFO L225 Difference]: With dead ends: 149 [2021-05-02 20:18:41,180 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 20:18:41,181 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:18:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 20:18:41,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 20:18:41,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 86 states have internal predecessors, (95), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 20:18:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2021-05-02 20:18:41,185 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 69 [2021-05-02 20:18:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:41,186 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2021-05-02 20:18:41,186 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:18:41,186 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2021-05-02 20:18:41,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:18:41,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:41,186 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:41,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:41,402 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:41,403 INFO L82 PathProgramCache]: Analyzing trace with hash -392102192, now seen corresponding path program 2 times [2021-05-02 20:18:41,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:41,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868054300] [2021-05-02 20:18:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:41,409 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:41,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339958830] [2021-05-02 20:18:41,409 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:41,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:41,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:18:41,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:41,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 20:18:41,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:41,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868054300] [2021-05-02 20:18:41,622 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:41,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339958830] [2021-05-02 20:18:41,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339958830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:41,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:41,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:18:41,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526935267] [2021-05-02 20:18:41,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:18:41,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:41,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:18:41,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:41,624 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:18:41,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:41,786 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2021-05-02 20:18:41,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:18:41,786 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 20:18:41,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:41,788 INFO L225 Difference]: With dead ends: 164 [2021-05-02 20:18:41,788 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 20:18:41,789 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:18:41,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 20:18:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-02 20:18:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 94 states have internal predecessors, (103), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 20:18:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-02 20:18:41,799 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 69 [2021-05-02 20:18:41,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:41,799 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-02 20:18:41,799 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:18:41,800 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-02 20:18:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:18:41,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:41,803 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:42,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:42,019 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:42,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:42,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1674813879, now seen corresponding path program 2 times [2021-05-02 20:18:42,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:42,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103263558] [2021-05-02 20:18:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:42,025 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:42,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473371613] [2021-05-02 20:18:42,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:42,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:42,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:42,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:18:42,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:42,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:18:42,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:42,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103263558] [2021-05-02 20:18:42,339 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:42,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473371613] [2021-05-02 20:18:42,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473371613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:42,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:42,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:18:42,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630304790] [2021-05-02 20:18:42,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:18:42,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:42,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:18:42,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:42,341 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:18:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:42,498 INFO L93 Difference]: Finished difference Result 188 states and 239 transitions. [2021-05-02 20:18:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:18:42,499 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-02 20:18:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:42,500 INFO L225 Difference]: With dead ends: 188 [2021-05-02 20:18:42,500 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 20:18:42,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:18:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 20:18:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-05-02 20:18:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 20:18:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-02 20:18:42,505 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 74 [2021-05-02 20:18:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:42,506 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-02 20:18:42,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:18:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-02 20:18:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:18:42,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:42,506 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2021-05-02 20:18:42,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:18:42,722 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:42,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:42,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1927051720, now seen corresponding path program 3 times [2021-05-02 20:18:42,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:42,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607454822] [2021-05-02 20:18:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:42,728 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:42,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419125777] [2021-05-02 20:18:42,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:42,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:18:42,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:42,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:18:42,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:42,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-05-02 20:18:43,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:43,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607454822] [2021-05-02 20:18:43,065 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:43,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419125777] [2021-05-02 20:18:43,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419125777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:43,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:43,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:18:43,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136954394] [2021-05-02 20:18:43,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:18:43,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:43,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:18:43,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:43,067 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:18:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:43,276 INFO L93 Difference]: Finished difference Result 211 states and 264 transitions. [2021-05-02 20:18:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:18:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-02 20:18:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:43,278 INFO L225 Difference]: With dead ends: 211 [2021-05-02 20:18:43,278 INFO L226 Difference]: Without dead ends: 211 [2021-05-02 20:18:43,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:43,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-02 20:18:43,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-05-02 20:18:43,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 119 states have internal predecessors, (132), 57 states have call successors, (57), 26 states have call predecessors, (57), 25 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 20:18:43,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-05-02 20:18:43,283 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 74 [2021-05-02 20:18:43,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:43,284 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-05-02 20:18:43,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:18:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-05-02 20:18:43,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:18:43,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:43,284 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2021-05-02 20:18:43,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:18:43,493 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:43,494 INFO L82 PathProgramCache]: Analyzing trace with hash 504849037, now seen corresponding path program 4 times [2021-05-02 20:18:43,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:43,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768949065] [2021-05-02 20:18:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:43,499 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:43,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023469734] [2021-05-02 20:18:43,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:43,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:18:43,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:43,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 20:18:43,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:43,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 53 proven. 22 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 20:18:43,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:43,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768949065] [2021-05-02 20:18:43,826 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:43,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023469734] [2021-05-02 20:18:43,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023469734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:43,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:43,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:18:43,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715277310] [2021-05-02 20:18:43,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:18:43,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:43,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:18:43,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:18:43,828 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:18:44,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:44,142 INFO L93 Difference]: Finished difference Result 217 states and 270 transitions. [2021-05-02 20:18:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:18:44,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 20:18:44,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:44,143 INFO L225 Difference]: With dead ends: 217 [2021-05-02 20:18:44,143 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 20:18:44,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:18:44,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 20:18:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-02 20:18:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 103 states have (on average 1.145631067961165) internal successors, (118), 107 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 20:18:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-05-02 20:18:44,148 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 79 [2021-05-02 20:18:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:44,148 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-05-02 20:18:44,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:18:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-05-02 20:18:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:18:44,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:44,149 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2021-05-02 20:18:44,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:18:44,364 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:44,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:44,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1530341036, now seen corresponding path program 3 times [2021-05-02 20:18:44,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:44,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580120141] [2021-05-02 20:18:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:44,370 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:44,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251926788] [2021-05-02 20:18:44,370 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:44,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:18:44,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:44,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:18:44,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:44,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-02 20:18:44,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:44,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580120141] [2021-05-02 20:18:44,609 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:44,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251926788] [2021-05-02 20:18:44,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251926788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:44,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:44,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:18:44,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895303609] [2021-05-02 20:18:44,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:18:44,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:44,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:18:44,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:18:44,610 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:18:44,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:44,918 INFO L93 Difference]: Finished difference Result 207 states and 256 transitions. [2021-05-02 20:18:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:18:44,918 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 20:18:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:44,919 INFO L225 Difference]: With dead ends: 207 [2021-05-02 20:18:44,919 INFO L226 Difference]: Without dead ends: 202 [2021-05-02 20:18:44,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:18:44,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-02 20:18:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2021-05-02 20:18:44,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 118 states have (on average 1.152542372881356) internal successors, (136), 122 states have internal predecessors, (136), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 20:18:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 241 transitions. [2021-05-02 20:18:44,924 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 241 transitions. Word has length 79 [2021-05-02 20:18:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:44,925 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 241 transitions. [2021-05-02 20:18:44,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:18:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 241 transitions. [2021-05-02 20:18:44,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:18:44,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:44,926 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:45,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:45,141 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:45,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:45,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1037601673, now seen corresponding path program 5 times [2021-05-02 20:18:45,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:45,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473988495] [2021-05-02 20:18:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:45,147 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:45,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297916852] [2021-05-02 20:18:45,147 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:45,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 20:18:45,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:45,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 20:18:45,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:45,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 20:18:45,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:45,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473988495] [2021-05-02 20:18:45,367 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:45,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297916852] [2021-05-02 20:18:45,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297916852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:45,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:45,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:18:45,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465860557] [2021-05-02 20:18:45,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:18:45,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:45,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:18:45,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:18:45,369 INFO L87 Difference]: Start difference. First operand 199 states and 241 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:18:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:45,472 INFO L93 Difference]: Finished difference Result 229 states and 286 transitions. [2021-05-02 20:18:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:18:45,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-05-02 20:18:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:45,474 INFO L225 Difference]: With dead ends: 229 [2021-05-02 20:18:45,474 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 20:18:45,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 20:18:45,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 216. [2021-05-02 20:18:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 125 states have (on average 1.16) internal successors, (145), 130 states have internal predecessors, (145), 63 states have call successors, (63), 28 states have call predecessors, (63), 27 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:18:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 268 transitions. [2021-05-02 20:18:45,482 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 268 transitions. Word has length 87 [2021-05-02 20:18:45,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:45,484 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 268 transitions. [2021-05-02 20:18:45,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:18:45,484 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 268 transitions. [2021-05-02 20:18:45,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:18:45,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:45,485 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:45,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:18:45,701 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1133237577, now seen corresponding path program 6 times [2021-05-02 20:18:45,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:45,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946691264] [2021-05-02 20:18:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:45,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:45,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910108169] [2021-05-02 20:18:45,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:45,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-02 20:18:45,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:45,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:18:45,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:45,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:18:45,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:45,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946691264] [2021-05-02 20:18:45,929 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:45,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910108169] [2021-05-02 20:18:45,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910108169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:45,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:45,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:18:45,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892903102] [2021-05-02 20:18:45,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:18:45,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:45,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:18:45,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:45,940 INFO L87 Difference]: Start difference. First operand 216 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:18:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:46,150 INFO L93 Difference]: Finished difference Result 239 states and 300 transitions. [2021-05-02 20:18:46,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:18:46,150 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), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-02 20:18:46,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:46,151 INFO L225 Difference]: With dead ends: 239 [2021-05-02 20:18:46,151 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 20:18:46,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:18:46,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 20:18:46,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-05-02 20:18:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 136 states have (on average 1.1544117647058822) internal successors, (157), 141 states have internal predecessors, (157), 69 states have call successors, (69), 30 states have call predecessors, (69), 29 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 20:18:46,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 292 transitions. [2021-05-02 20:18:46,157 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 292 transitions. Word has length 87 [2021-05-02 20:18:46,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:46,157 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 292 transitions. [2021-05-02 20:18:46,157 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), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:18:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 292 transitions. [2021-05-02 20:18:46,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:18:46,158 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:46,158 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:46,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:18:46,373 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:46,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:46,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1104608426, now seen corresponding path program 7 times [2021-05-02 20:18:46,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:46,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359966843] [2021-05-02 20:18:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:46,379 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:46,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205768173] [2021-05-02 20:18:46,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:46,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:18:46,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:46,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:18:46,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:46,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359966843] [2021-05-02 20:18:46,649 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:46,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205768173] [2021-05-02 20:18:46,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205768173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:46,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:46,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:18:46,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71345065] [2021-05-02 20:18:46,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:18:46,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:46,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:18:46,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:46,651 INFO L87 Difference]: Start difference. First operand 235 states and 292 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 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) [2021-05-02 20:18:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:46,932 INFO L93 Difference]: Finished difference Result 249 states and 313 transitions. [2021-05-02 20:18:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:18:46,932 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 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 87 [2021-05-02 20:18:46,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:46,933 INFO L225 Difference]: With dead ends: 249 [2021-05-02 20:18:46,933 INFO L226 Difference]: Without dead ends: 249 [2021-05-02 20:18:46,934 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:18:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-02 20:18:46,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2021-05-02 20:18:46,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:18:46,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 20:18:46,939 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 20:18:46,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:46,939 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 20:18:46,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 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) [2021-05-02 20:18:46,939 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 20:18:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:18:46,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:46,940 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:47,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:18:47,157 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:47,157 INFO L82 PathProgramCache]: Analyzing trace with hash -942157577, now seen corresponding path program 8 times [2021-05-02 20:18:47,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:47,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096695248] [2021-05-02 20:18:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:47,162 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:47,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036276279] [2021-05-02 20:18:47,163 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 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 [2021-05-02 20:18:47,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:47,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:47,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:18:47,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:47,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:18:47,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:47,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096695248] [2021-05-02 20:18:47,402 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:47,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036276279] [2021-05-02 20:18:47,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036276279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:47,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:47,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:18:47,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320433730] [2021-05-02 20:18:47,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:18:47,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:47,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:18:47,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:47,403 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:18:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:47,636 INFO L93 Difference]: Finished difference Result 260 states and 329 transitions. [2021-05-02 20:18:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:18:47,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-02 20:18:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:47,638 INFO L225 Difference]: With dead ends: 260 [2021-05-02 20:18:47,638 INFO L226 Difference]: Without dead ends: 257 [2021-05-02 20:18:47,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:18:47,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-02 20:18:47,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 247. [2021-05-02 20:18:47,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:18:47,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 20:18:47,643 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 20:18:47,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:47,643 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 20:18:47,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:18:47,644 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 20:18:47,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:18:47,644 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:47,644 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:47,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:47,860 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:47,860 INFO L82 PathProgramCache]: Analyzing trace with hash -913528426, now seen corresponding path program 9 times [2021-05-02 20:18:47,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:47,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392308182] [2021-05-02 20:18:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:47,865 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:47,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332366562] [2021-05-02 20:18:47,865 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 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 [2021-05-02 20:18:47,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:18:47,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:47,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:18:47,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:47,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-02 20:18:48,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:48,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392308182] [2021-05-02 20:18:48,084 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:48,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332366562] [2021-05-02 20:18:48,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332366562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:48,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:48,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:18:48,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596232300] [2021-05-02 20:18:48,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:18:48,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:48,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:18:48,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:48,086 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:18:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:54,250 INFO L93 Difference]: Finished difference Result 251 states and 313 transitions. [2021-05-02 20:18:54,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:18:54,251 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-02 20:18:54,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:54,251 INFO L225 Difference]: With dead ends: 251 [2021-05-02 20:18:54,252 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 20:18:54,252 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:18:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 20:18:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 228. [2021-05-02 20:18:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 141 states have internal predecessors, (154), 61 states have call successors, (61), 31 states have call predecessors, (61), 30 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 20:18:54,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 274 transitions. [2021-05-02 20:18:54,257 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 274 transitions. Word has length 87 [2021-05-02 20:18:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:54,257 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 274 transitions. [2021-05-02 20:18:54,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:18:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 274 transitions. [2021-05-02 20:18:54,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:18:54,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:54,258 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:54,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:54,473 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:54,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:54,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1009164330, now seen corresponding path program 10 times [2021-05-02 20:18:54,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:54,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244003707] [2021-05-02 20:18:54,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:54,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:54,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289713061] [2021-05-02 20:18:54,478 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 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 [2021-05-02 20:18:54,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:18:54,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:54,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:18:54,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:54,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:18:54,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:54,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244003707] [2021-05-02 20:18:54,728 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:54,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289713061] [2021-05-02 20:18:54,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289713061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:54,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:54,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:18:54,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139942072] [2021-05-02 20:18:54,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:18:54,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:54,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:18:54,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:54,730 INFO L87 Difference]: Start difference. First operand 228 states and 274 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 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) [2021-05-02 20:18:54,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:54,969 INFO L93 Difference]: Finished difference Result 238 states and 287 transitions. [2021-05-02 20:18:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:18:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 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 87 [2021-05-02 20:18:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:54,971 INFO L225 Difference]: With dead ends: 238 [2021-05-02 20:18:54,971 INFO L226 Difference]: Without dead ends: 238 [2021-05-02 20:18:54,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:18:54,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-02 20:18:54,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2021-05-02 20:18:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 146 states have internal predecessors, (158), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:18:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2021-05-02 20:18:54,976 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 87 [2021-05-02 20:18:54,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:54,976 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2021-05-02 20:18:54,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 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) [2021-05-02 20:18:54,976 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2021-05-02 20:18:54,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:18:54,977 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:54,977 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:55,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 20:18:55,192 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:55,193 INFO L82 PathProgramCache]: Analyzing trace with hash -428683728, now seen corresponding path program 3 times [2021-05-02 20:18:55,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:55,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504142892] [2021-05-02 20:18:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:55,200 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:55,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629617525] [2021-05-02 20:18:55,201 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 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 [2021-05-02 20:18:55,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:18:55,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:55,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 20:18:55,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:55,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:55,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 96 proven. 13 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-05-02 20:18:55,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:55,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504142892] [2021-05-02 20:18:55,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:55,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629617525] [2021-05-02 20:18:55,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629617525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:55,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:55,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:18:55,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435009494] [2021-05-02 20:18:55,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:18:55,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:55,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:18:55,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:55,461 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:18:59,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:59,625 INFO L93 Difference]: Finished difference Result 266 states and 321 transitions. [2021-05-02 20:18:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:18:59,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 92 [2021-05-02 20:18:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:59,626 INFO L225 Difference]: With dead ends: 266 [2021-05-02 20:18:59,627 INFO L226 Difference]: Without dead ends: 266 [2021-05-02 20:18:59,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:18:59,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-02 20:18:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 252. [2021-05-02 20:18:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 152 states have (on average 1.131578947368421) internal successors, (172), 158 states have internal predecessors, (172), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-02 20:18:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 300 transitions. [2021-05-02 20:18:59,632 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 300 transitions. Word has length 92 [2021-05-02 20:18:59,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:59,632 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 300 transitions. [2021-05-02 20:18:59,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:18:59,632 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 300 transitions. [2021-05-02 20:18:59,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:18:59,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:59,633 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:59,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 20:18:59,848 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash 264417969, now seen corresponding path program 11 times [2021-05-02 20:18:59,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:59,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317492566] [2021-05-02 20:18:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:59,854 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:59,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096693045] [2021-05-02 20:18:59,854 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 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 [2021-05-02 20:18:59,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 20:18:59,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:59,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:18:59,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:59,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 20:19:00,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:00,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317492566] [2021-05-02 20:19:00,211 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:00,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096693045] [2021-05-02 20:19:00,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096693045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:00,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:00,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:00,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114526557] [2021-05-02 20:19:00,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:00,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:00,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:00,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:00,212 INFO L87 Difference]: Start difference. First operand 252 states and 300 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:19:00,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:00,477 INFO L93 Difference]: Finished difference Result 280 states and 337 transitions. [2021-05-02 20:19:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:19:00,477 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-02 20:19:00,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:00,479 INFO L225 Difference]: With dead ends: 280 [2021-05-02 20:19:00,479 INFO L226 Difference]: Without dead ends: 280 [2021-05-02 20:19:00,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:19:00,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-02 20:19:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 266. [2021-05-02 20:19:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 161 states have (on average 1.1304347826086956) internal successors, (182), 167 states have internal predecessors, (182), 68 states have call successors, (68), 37 states have call predecessors, (68), 36 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 20:19:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 316 transitions. [2021-05-02 20:19:00,486 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 316 transitions. Word has length 92 [2021-05-02 20:19:00,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:00,486 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 316 transitions. [2021-05-02 20:19:00,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:19:00,487 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 316 transitions. [2021-05-02 20:19:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:19:00,488 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:00,488 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:00,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:00,704 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:00,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:00,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1542255729, now seen corresponding path program 12 times [2021-05-02 20:19:00,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:00,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886818835] [2021-05-02 20:19:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:00,712 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:00,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618154788] [2021-05-02 20:19:00,712 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 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 [2021-05-02 20:19:00,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 20:19:00,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:00,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 20:19:00,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:00,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 42 proven. 47 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 20:19:00,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:00,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886818835] [2021-05-02 20:19:00,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:00,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618154788] [2021-05-02 20:19:00,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618154788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:00,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:00,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:19:00,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461492824] [2021-05-02 20:19:00,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:19:00,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:00,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:19:00,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:00,961 INFO L87 Difference]: Start difference. First operand 266 states and 316 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:19:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:07,400 INFO L93 Difference]: Finished difference Result 322 states and 402 transitions. [2021-05-02 20:19:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:19:07,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 92 [2021-05-02 20:19:07,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:07,402 INFO L225 Difference]: With dead ends: 322 [2021-05-02 20:19:07,402 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 20:19:07,402 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:07,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 20:19:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 280. [2021-05-02 20:19:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 167 states have (on average 1.1377245508982037) internal successors, (190), 173 states have internal predecessors, (190), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 20:19:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 340 transitions. [2021-05-02 20:19:07,408 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 340 transitions. Word has length 92 [2021-05-02 20:19:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:07,408 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 340 transitions. [2021-05-02 20:19:07,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:19:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 340 transitions. [2021-05-02 20:19:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:19:07,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:07,409 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:07,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 20:19:07,625 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:07,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2059609870, now seen corresponding path program 13 times [2021-05-02 20:19:07,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:07,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953967903] [2021-05-02 20:19:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:07,634 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:07,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653501996] [2021-05-02 20:19:07,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 20:19:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:07,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 20:19:07,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:07,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 20:19:07,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:07,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953967903] [2021-05-02 20:19:07,976 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:07,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653501996] [2021-05-02 20:19:07,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653501996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:07,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:07,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:07,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125282656] [2021-05-02 20:19:07,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:07,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:07,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:07,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:07,980 INFO L87 Difference]: Start difference. First operand 280 states and 340 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:19:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:08,266 INFO L93 Difference]: Finished difference Result 302 states and 367 transitions. [2021-05-02 20:19:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:19:08,266 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-02 20:19:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:08,267 INFO L225 Difference]: With dead ends: 302 [2021-05-02 20:19:08,267 INFO L226 Difference]: Without dead ends: 302 [2021-05-02 20:19:08,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:19:08,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-02 20:19:08,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 288. [2021-05-02 20:19:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 173 states have (on average 1.1329479768786128) internal successors, (196), 179 states have internal predecessors, (196), 76 states have call successors, (76), 39 states have call predecessors, (76), 38 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 20:19:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 346 transitions. [2021-05-02 20:19:08,279 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 346 transitions. Word has length 92 [2021-05-02 20:19:08,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:08,279 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 346 transitions. [2021-05-02 20:19:08,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:19:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 346 transitions. [2021-05-02 20:19:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:19:08,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:08,280 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:08,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:08,497 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:08,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:08,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1250826676, now seen corresponding path program 14 times [2021-05-02 20:19:08,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:08,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417084488] [2021-05-02 20:19:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:08,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:08,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542520444] [2021-05-02 20:19:08,506 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 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 [2021-05-02 20:19:08,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:19:08,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:19:08,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:08,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-02 20:19:08,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:08,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417084488] [2021-05-02 20:19:08,805 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:08,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542520444] [2021-05-02 20:19:08,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542520444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:08,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:08,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:19:08,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87703991] [2021-05-02 20:19:08,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:19:08,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:08,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:19:08,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:19:08,806 INFO L87 Difference]: Start difference. First operand 288 states and 346 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:19:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:09,046 INFO L93 Difference]: Finished difference Result 326 states and 397 transitions. [2021-05-02 20:19:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:19:09,047 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), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 20:19:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:09,058 INFO L225 Difference]: With dead ends: 326 [2021-05-02 20:19:09,058 INFO L226 Difference]: Without dead ends: 322 [2021-05-02 20:19:09,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:19:09,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-02 20:19:09,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-05-02 20:19:09,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 194 states have (on average 1.134020618556701) internal successors, (220), 200 states have internal predecessors, (220), 85 states have call successors, (85), 43 states have call predecessors, (85), 42 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-02 20:19:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 388 transitions. [2021-05-02 20:19:09,064 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 388 transitions. Word has length 97 [2021-05-02 20:19:09,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:09,064 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 388 transitions. [2021-05-02 20:19:09,064 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), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:19:09,064 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 388 transitions. [2021-05-02 20:19:09,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:19:09,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:09,065 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:09,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:19:09,273 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:09,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:09,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2018648621, now seen corresponding path program 15 times [2021-05-02 20:19:09,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:09,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640880448] [2021-05-02 20:19:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:09,285 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:09,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146750305] [2021-05-02 20:19:09,285 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 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 [2021-05-02 20:19:09,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:19:09,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:09,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:19:09,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:15,665 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:19:15,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 20:19:15,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:15,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640880448] [2021-05-02 20:19:15,696 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:15,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146750305] [2021-05-02 20:19:15,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146750305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:15,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:15,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:19:15,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593000139] [2021-05-02 20:19:15,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:19:15,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:15,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:19:15,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=87, Unknown=1, NotChecked=0, Total=110 [2021-05-02 20:19:15,697 INFO L87 Difference]: Start difference. First operand 322 states and 388 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:19:49,254 WARN L205 SmtUtils]: Spent 16.98 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-02 20:20:12,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:12,837 INFO L93 Difference]: Finished difference Result 357 states and 447 transitions. [2021-05-02 20:20:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:20:12,847 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 97 [2021-05-02 20:20:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:12,849 INFO L225 Difference]: With dead ends: 357 [2021-05-02 20:20:12,849 INFO L226 Difference]: Without dead ends: 353 [2021-05-02 20:20:12,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 23180.5ms TimeCoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2021-05-02 20:20:12,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-02 20:20:12,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 345. [2021-05-02 20:20:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 207 states have (on average 1.1545893719806763) internal successors, (239), 213 states have internal predecessors, (239), 94 states have call successors, (94), 44 states have call predecessors, (94), 43 states have return successors, (92), 87 states have call predecessors, (92), 92 states have call successors, (92) [2021-05-02 20:20:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 425 transitions. [2021-05-02 20:20:12,855 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 425 transitions. Word has length 97 [2021-05-02 20:20:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:12,855 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 425 transitions. [2021-05-02 20:20:12,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:20:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 425 transitions. [2021-05-02 20:20:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:20:12,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:12,856 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:13,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 20:20:13,085 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:13,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:13,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2019996691, now seen corresponding path program 16 times [2021-05-02 20:20:13,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:13,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379376542] [2021-05-02 20:20:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:13,090 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:13,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729321913] [2021-05-02 20:20:13,090 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 [2021-05-02 20:20:13,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:20:13,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:13,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 20:20:13,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:13,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:13,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 67 proven. 66 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-05-02 20:20:14,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:14,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379376542] [2021-05-02 20:20:14,076 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:14,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729321913] [2021-05-02 20:20:14,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729321913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:14,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:14,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:20:14,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461364949] [2021-05-02 20:20:14,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:20:14,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:14,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:20:14,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:20:14,078 INFO L87 Difference]: Start difference. First operand 345 states and 425 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 20:20:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:14,472 INFO L93 Difference]: Finished difference Result 369 states and 460 transitions. [2021-05-02 20:20:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:20:14,473 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 97 [2021-05-02 20:20:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:14,474 INFO L225 Difference]: With dead ends: 369 [2021-05-02 20:20:14,474 INFO L226 Difference]: Without dead ends: 365 [2021-05-02 20:20:14,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:20:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-05-02 20:20:14,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 352. [2021-05-02 20:20:14,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 211 states have (on average 1.1516587677725119) internal successors, (243), 218 states have internal predecessors, (243), 96 states have call successors, (96), 45 states have call predecessors, (96), 44 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) [2021-05-02 20:20:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 433 transitions. [2021-05-02 20:20:14,481 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 433 transitions. Word has length 97 [2021-05-02 20:20:14,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:14,481 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 433 transitions. [2021-05-02 20:20:14,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 20:20:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 433 transitions. [2021-05-02 20:20:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:20:14,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:14,482 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:14,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 20:20:14,693 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:14,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1249478606, now seen corresponding path program 4 times [2021-05-02 20:20:14,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:14,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942871725] [2021-05-02 20:20:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:14,702 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:14,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109482718] [2021-05-02 20:20:14,703 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:14,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:20:14,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:14,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 20:20:14,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:14,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:14,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:15,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:15,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:15,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:15,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:15,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:15,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:17,272 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 20:20:20,682 WARN L205 SmtUtils]: Spent 3.08 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 20:20:20,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:20,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:20,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:20,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:20,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:20,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:20,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:20,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:20,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 36 proven. 59 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-05-02 20:20:20,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:20,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942871725] [2021-05-02 20:20:20,746 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:20,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109482718] [2021-05-02 20:20:20,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109482718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:20,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:20,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:20:20,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334715105] [2021-05-02 20:20:20,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:20:20,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:20,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:20:20,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:20:20,747 INFO L87 Difference]: Start difference. First operand 352 states and 433 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (18), 1 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:20:21,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:21,667 INFO L93 Difference]: Finished difference Result 384 states and 490 transitions. [2021-05-02 20:20:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:20:21,668 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (18), 1 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 20:20:21,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:21,668 INFO L225 Difference]: With dead ends: 384 [2021-05-02 20:20:21,668 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:20:21,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 5714.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:20:21,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:20:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:20:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:20:21,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:20:21,670 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 97 [2021-05-02 20:20:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:21,670 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:20:21,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (18), 1 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:20:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:20:21,670 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:20:21,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:21,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:20:21 BasicIcfg [2021-05-02 20:20:21,885 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:20:21,885 INFO L168 Benchmark]: Toolchain (without parser) took 108675.90 ms. Allocated memory was 177.2 MB in the beginning and 232.8 MB in the end (delta: 55.6 MB). Free memory was 141.7 MB in the beginning and 164.1 MB in the end (delta: -22.5 MB). Peak memory consumption was 33.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:20:21,885 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 177.2 MB. Free memory is still 158.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:20:21,885 INFO L168 Benchmark]: CACSL2BoogieTranslator took 413.03 ms. Allocated memory is still 177.2 MB. Free memory was 141.5 MB in the beginning and 160.4 MB in the end (delta: -19.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:20:21,885 INFO L168 Benchmark]: Boogie Preprocessor took 47.86 ms. Allocated memory is still 177.2 MB. Free memory was 160.4 MB in the beginning and 158.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:20:21,885 INFO L168 Benchmark]: RCFGBuilder took 336.93 ms. Allocated memory is still 177.2 MB. Free memory was 158.9 MB in the beginning and 143.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:20:21,885 INFO L168 Benchmark]: IcfgTransformer took 31.36 ms. Allocated memory is still 177.2 MB. Free memory was 143.2 MB in the beginning and 142.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:20:21,885 INFO L168 Benchmark]: TraceAbstraction took 107827.11 ms. Allocated memory was 177.2 MB in the beginning and 232.8 MB in the end (delta: 55.6 MB). Free memory was 141.6 MB in the beginning and 164.1 MB in the end (delta: -22.6 MB). Peak memory consumption was 32.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:20:21,886 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 177.2 MB. Free memory is still 158.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 413.03 ms. Allocated memory is still 177.2 MB. Free memory was 141.5 MB in the beginning and 160.4 MB in the end (delta: -19.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.86 ms. Allocated memory is still 177.2 MB. Free memory was 160.4 MB in the beginning and 158.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 336.93 ms. Allocated memory is still 177.2 MB. Free memory was 158.9 MB in the beginning and 143.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 31.36 ms. Allocated memory is still 177.2 MB. Free memory was 143.2 MB in the beginning and 142.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 107827.11 ms. Allocated memory was 177.2 MB in the beginning and 232.8 MB in the end (delta: 55.6 MB). Free memory was 141.6 MB in the beginning and 164.1 MB in the end (delta: -22.6 MB). Peak memory consumption was 32.4 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, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 107783.9ms, OverallIterations: 29, TraceHistogramMax: 12, EmptinessCheckTime: 39.9ms, AutomataDifference: 79961.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1235 SDtfs, 573 SDslu, 6897 SDs, 0 SdLazy, 6839 SolverSat, 563 SolverUnsat, 27 SolverUnknown, 0 SolverNotchecked, 60386.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2187 GetRequests, 1848 SyntacticMatches, 8 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 31786.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=352occurred in iteration=28, InterpolantAutomatonStates: 297, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 237.9ms AutomataMinimizationTime, 29 MinimizatonAttempts, 227 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 323.8ms SsaConstructionTime, 850.2ms SatisfiabilityAnalysisTime, 19085.9ms InterpolantComputationTime, 2140 NumberOfCodeBlocks, 1951 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2111 ConstructedInterpolants, 0 QuantifiedInterpolants, 11709 SizeOfPredicates, 153 NumberOfNonLiveVariables, 5735 ConjunctsInSsa, 983 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 4026/4645 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...