/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/fermat2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:37:38,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:37:38,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:37:38,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:37:38,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:37:38,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:37:38,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:37:38,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:37:38,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:37:38,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:37:38,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:37:38,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:37:38,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:37:38,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:37:38,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:37:38,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:37:38,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:37:38,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:37:38,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:37:38,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:37:38,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:37:38,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:37:38,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:37:38,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:37:38,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:37:38,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:37:38,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:37:38,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:37:38,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:37:38,587 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:37:38,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:37:38,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:37:38,588 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:37:38,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:37:38,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:37:38,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:37:38,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:37:38,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:37:38,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:37:38,589 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:37:38,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:37:38,589 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:37:38,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:37:38,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:37:38,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:37:38,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:37:38,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:37:38,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:37:38,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:37:38,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:37:38,590 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:37:38,590 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:37:38,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:37:38,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:37:38,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:37:38,837 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:37:38,838 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:37:38,838 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2021-05-02 20:37:38,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59de0de4f/ea8f6d6dc86749a2bcb70923e74d87fe/FLAG66af31755 [2021-05-02 20:37:39,222 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:37:39,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2021-05-02 20:37:39,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59de0de4f/ea8f6d6dc86749a2bcb70923e74d87fe/FLAG66af31755 [2021-05-02 20:37:39,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59de0de4f/ea8f6d6dc86749a2bcb70923e74d87fe [2021-05-02 20:37:39,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:37:39,660 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:37:39,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:37:39,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:37:39,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:37:39,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:37:39" (1/1) ... [2021-05-02 20:37:39,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@514186be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:39, skipping insertion in model container [2021-05-02 20:37:39,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:37:39" (1/1) ... [2021-05-02 20:37:39,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:37:39,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:37:39,767 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/fermat2-ll_unwindbound100.c[524,537] [2021-05-02 20:37:39,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:37:39,783 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:37:39,795 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/fermat2-ll_unwindbound100.c[524,537] [2021-05-02 20:37:39,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:37:39,822 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:37:39,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:39 WrapperNode [2021-05-02 20:37:39,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:37:39,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:37:39,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:37:39,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:37:39,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:39" (1/1) ... [2021-05-02 20:37:39,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:39" (1/1) ... [2021-05-02 20:37:39,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:39" (1/1) ... [2021-05-02 20:37:39,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:39" (1/1) ... [2021-05-02 20:37:39,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:39" (1/1) ... [2021-05-02 20:37:39,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:39" (1/1) ... [2021-05-02 20:37:39,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:39" (1/1) ... [2021-05-02 20:37:39,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:37:39,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:37:39,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:37:39,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:37:39,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:39" (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 20:37:39,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:37:39,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:37:39,937 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:37:39,937 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:37:39,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:37:39,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:37:39,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:37:39,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:37:39,938 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:37:39,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:37:39,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:37:39,938 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:37:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:37:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:37:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:37:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:37:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:37:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:37:39,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:37:39,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:37:40,168 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:37:40,168 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:37:40,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:37:40 BoogieIcfgContainer [2021-05-02 20:37:40,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:37:40,170 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:37:40,170 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:37:40,170 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:37:40,172 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:37:40" (1/1) ... [2021-05-02 20:37:40,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:37:40 BasicIcfg [2021-05-02 20:37:40,199 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:37:40,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:37:40,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:37:40,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:37:40,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:37:39" (1/4) ... [2021-05-02 20:37:40,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78aa0a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:37:40, skipping insertion in model container [2021-05-02 20:37:40,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:39" (2/4) ... [2021-05-02 20:37:40,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78aa0a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:37:40, skipping insertion in model container [2021-05-02 20:37:40,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:37:40" (3/4) ... [2021-05-02 20:37:40,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78aa0a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:37:40, skipping insertion in model container [2021-05-02 20:37:40,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:37:40" (4/4) ... [2021-05-02 20:37:40,203 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.cJordan [2021-05-02 20:37:40,207 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:37:40,209 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:37:40,220 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:37:40,239 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:37:40,239 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:37:40,240 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:37:40,240 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:37:40,240 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:37:40,240 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:37:40,240 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:37:40,240 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:37:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:37:40,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:37:40,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:40,256 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:37:40,257 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:40,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:40,267 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-02 20:37:40,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:40,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793721564] [2021-05-02 20:37:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:40,350 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:40,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677493503] [2021-05-02 20:37:40,351 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 20:37:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:37:40,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:37:40,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:37:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:37:40,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:40,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793721564] [2021-05-02 20:37:40,474 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:40,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677493503] [2021-05-02 20:37:40,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677493503] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:37:40,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:37:40,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:37:40,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090792569] [2021-05-02 20:37:40,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:37:40,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:40,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:37:40,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:37:40,486 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:37:40,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:37:40,497 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-02 20:37:40,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:37:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 20:37:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:37:40,502 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:37:40,502 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:37:40,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:37:40,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:37:40,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:37:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:37:40,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 20:37:40,522 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 20:37:40,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:37:40,522 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 20:37:40,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:37:40,523 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 20:37:40,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:37:40,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:40,524 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:37:40,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:37:40,737 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:40,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-02 20:37:40,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:40,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561987072] [2021-05-02 20:37:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:40,750 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:40,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9016167] [2021-05-02 20:37:40,750 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 20:37:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:37:40,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:37:40,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:37:40,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:40,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:40,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:40,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:40,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:37:40,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:40,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561987072] [2021-05-02 20:37:40,956 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:40,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9016167] [2021-05-02 20:37:40,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9016167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:37:40,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:37:40,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:37:40,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583513499] [2021-05-02 20:37:40,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:37:40,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:40,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:37:40,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:37:40,963 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:37:40,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:37:40,977 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-02 20:37:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:37:40,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:37:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:37:40,978 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:37:40,978 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:37:40,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:37:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:37:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:37:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:37:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 20:37:40,989 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 20:37:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:37:40,989 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 20:37:40,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:37:40,990 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 20:37:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:37:40,990 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:40,990 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:37:41,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:41,191 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:41,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:41,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-02 20:37:41,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:41,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378011393] [2021-05-02 20:37:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:41,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:41,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747013800] [2021-05-02 20:37:41,202 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 20:37:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:37:41,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:37:41,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:37:41,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:41,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:41,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:41,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:37:41,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:41,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378011393] [2021-05-02 20:37:41,448 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:41,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747013800] [2021-05-02 20:37:41,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747013800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:37:41,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:37:41,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:37:41,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670921387] [2021-05-02 20:37:41,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:37:41,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:41,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:37:41,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:37:41,450 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:37:45,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:37:45,549 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-02 20:37:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:37:45,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:37:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:37:45,551 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:37:45,551 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:37:45,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:37:45,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:37:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 20:37:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:37:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 20:37:45,555 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 20:37:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:37:45,555 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 20:37:45,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:37:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 20:37:45,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:37:45,556 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:45,556 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:37:45,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:45,757 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-02 20:37:45,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:45,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027027351] [2021-05-02 20:37:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:45,766 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:45,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540658151] [2021-05-02 20:37:45,766 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 20:37:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:37:45,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:37:45,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:37:45,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:37:46,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:46,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027027351] [2021-05-02 20:37:46,013 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:46,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540658151] [2021-05-02 20:37:46,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540658151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:37:46,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:37:46,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:37:46,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897633739] [2021-05-02 20:37:46,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:37:46,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:46,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:37:46,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:37:46,028 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:37:53,708 WARN L205 SmtUtils]: Spent 5.55 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:38:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:38:01,424 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-05-02 20:38:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:38:01,424 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 20:38:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:38:01,427 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:38:01,427 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:38:01,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 5695.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:38:01,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:38:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 20:38:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:38:01,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 20:38:01,432 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 29 [2021-05-02 20:38:01,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:38:01,432 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 20:38:01,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:38:01,432 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 20:38:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:38:01,433 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:38:01,433 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:38:01,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:38:01,634 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:38:01,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:38:01,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-02 20:38:01,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:38:01,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630117032] [2021-05-02 20:38:01,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:38:01,642 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:38:01,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240112291] [2021-05-02 20:38:01,642 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 20:38:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:38:01,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:38:01,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:38:01,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:01,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:01,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:01,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:01,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:01,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:01,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:01,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:38:01,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:38:01,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630117032] [2021-05-02 20:38:01,765 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:38:01,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240112291] [2021-05-02 20:38:01,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240112291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:38:01,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:38:01,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:38:01,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688034798] [2021-05-02 20:38:01,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:38:01,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:38:01,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:38:01,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:38:01,767 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:38:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:38:01,790 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-02 20:38:01,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:38:01,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:38:01,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:38:01,792 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:38:01,792 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 20:38:01,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:38:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 20:38:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 20:38:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:38:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-05-02 20:38:01,795 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 32 [2021-05-02 20:38:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:38:01,795 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-05-02 20:38:01,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:38:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-05-02 20:38:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:38:01,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:38:01,796 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:38:02,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:38:02,009 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:38:02,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:38:02,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1670019071, now seen corresponding path program 1 times [2021-05-02 20:38:02,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:38:02,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16078072] [2021-05-02 20:38:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:38:02,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:38:02,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289872919] [2021-05-02 20:38:02,022 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 20:38:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:38:02,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:38:02,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:38:02,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:38:02,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:38:02,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16078072] [2021-05-02 20:38:02,286 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:38:02,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289872919] [2021-05-02 20:38:02,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289872919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:38:02,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:38:02,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:38:02,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244515076] [2021-05-02 20:38:02,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:38:02,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:38:02,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:38:02,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:38:02,287 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:38:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:38:30,334 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-05-02 20:38:30,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:38:30,335 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:38:30,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:38:30,335 INFO L225 Difference]: With dead ends: 54 [2021-05-02 20:38:30,335 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 20:38:30,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:38:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 20:38:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-05-02 20:38:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 37 states have internal predecessors, (43), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:38:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2021-05-02 20:38:30,339 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 32 [2021-05-02 20:38:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:38:30,340 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2021-05-02 20:38:30,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:38:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2021-05-02 20:38:30,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:38:30,340 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:38:30,340 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:38:30,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:38:30,545 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:38:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:38:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1737444544, now seen corresponding path program 1 times [2021-05-02 20:38:30,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:38:30,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297783997] [2021-05-02 20:38:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:38:30,552 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:38:30,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552229305] [2021-05-02 20:38:30,552 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 20:38:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:38:30,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:38:30,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:38:30,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:40,798 WARN L205 SmtUtils]: Spent 8.05 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:39:01,113 WARN L205 SmtUtils]: Spent 13.37 s on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 20:39:01,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:01,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 3 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:39:01,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:39:01,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297783997] [2021-05-02 20:39:01,191 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:39:01,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552229305] [2021-05-02 20:39:01,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552229305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:39:01,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:39:01,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:39:01,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962425802] [2021-05-02 20:39:01,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:39:01,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:39:01,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:39:01,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=105, Unknown=4, NotChecked=0, Total=132 [2021-05-02 20:39:01,194 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:40:11,689 WARN L205 SmtUtils]: Spent 17.44 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 20:41:42,486 WARN L205 SmtUtils]: Spent 57.95 s on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 20:42:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:42:22,502 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 20:42:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:42:22,503 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:42:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:42:22,503 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:42:22,503 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 20:42:22,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 165280.4ms TimeCoverageRelationStatistics Valid=52, Invalid=239, Unknown=15, NotChecked=0, Total=306 [2021-05-02 20:42:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 20:42:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-05-02 20:42:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 41 states have internal predecessors, (46), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:42:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-05-02 20:42:22,507 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 32 [2021-05-02 20:42:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:42:22,507 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-05-02 20:42:22,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:42:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-05-02 20:42:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:42:22,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:42:22,508 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:42:22,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:42:22,713 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:42:22,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:42:22,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1427724253, now seen corresponding path program 1 times [2021-05-02 20:42:22,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:42:22,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859783701] [2021-05-02 20:42:22,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:42:22,720 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:42:22,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110876858] [2021-05-02 20:42:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:42:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:42:22,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:42:22,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:42:22,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:22,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:22,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:22,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 20:42:22,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:42:22,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859783701] [2021-05-02 20:42:22,881 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:42:22,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110876858] [2021-05-02 20:42:22,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110876858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:42:22,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:42:22,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:42:22,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980602199] [2021-05-02 20:42:22,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:42:22,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:42:22,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:42:22,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:42:22,883 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:42:31,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:42:31,190 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-05-02 20:42:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:42:31,190 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 20:42:31,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:42:31,191 INFO L225 Difference]: With dead ends: 64 [2021-05-02 20:42:31,191 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 20:42:31,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:42:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 20:42:31,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-05-02 20:42:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.205128205128205) internal successors, (47), 41 states have internal predecessors, (47), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:42:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2021-05-02 20:42:31,194 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 38 [2021-05-02 20:42:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:42:31,194 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2021-05-02 20:42:31,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:42:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2021-05-02 20:42:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:42:31,195 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:42:31,195 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:42:31,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:42:31,401 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:42:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:42:31,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1377493560, now seen corresponding path program 2 times [2021-05-02 20:42:31,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:42:31,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682856650] [2021-05-02 20:42:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:42:31,411 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:42:31,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383974859] [2021-05-02 20:42:31,411 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 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 20:42:31,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:42:31,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:42:31,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:42:31,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:42:31,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:42:31,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:42:31,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682856650] [2021-05-02 20:42:31,530 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:42:31,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383974859] [2021-05-02 20:42:31,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383974859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:42:31,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:42:31,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:42:31,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073288137] [2021-05-02 20:42:31,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:42:31,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:42:31,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:42:31,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:42:31,531 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:42:31,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:42:31,573 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-05-02 20:42:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:42:31,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 20:42:31,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:42:31,574 INFO L225 Difference]: With dead ends: 71 [2021-05-02 20:42:31,574 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 20:42:31,574 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:42:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 20:42:31,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 20:42:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 53 states have internal predecessors, (62), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:42:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2021-05-02 20:42:31,579 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 41 [2021-05-02 20:42:31,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:42:31,579 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2021-05-02 20:42:31,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:42:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2021-05-02 20:42:31,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:42:31,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:42:31,580 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:42:31,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:42:31,785 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:42:31,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:42:31,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1378566036, now seen corresponding path program 2 times [2021-05-02 20:42:31,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:42:31,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317830053] [2021-05-02 20:42:31,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:42:31,791 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:42:31,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468870255] [2021-05-02 20:42:31,791 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 20:42:31,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:42:31,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:42:31,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:42:31,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:42:31,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:31,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:42:32,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:42:32,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317830053] [2021-05-02 20:42:32,187 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:42:32,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468870255] [2021-05-02 20:42:32,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468870255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:42:32,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:42:32,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:42:32,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671737492] [2021-05-02 20:42:32,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:42:32,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:42:32,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:42:32,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:42:32,188 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:42:47,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:42:47,335 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2021-05-02 20:42:47,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:42:47,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 20:42:47,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:42:47,336 INFO L225 Difference]: With dead ends: 86 [2021-05-02 20:42:47,337 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 20:42:47,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:42:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 20:42:47,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2021-05-02 20:42:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.2) internal successors, (72), 62 states have internal predecessors, (72), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:42:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2021-05-02 20:42:47,341 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 41 [2021-05-02 20:42:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:42:47,341 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2021-05-02 20:42:47,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:42:47,341 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2021-05-02 20:42:47,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:42:47,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:42:47,341 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:42:47,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:42:47,545 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:42:47,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:42:47,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2028897579, now seen corresponding path program 1 times [2021-05-02 20:42:47,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:42:47,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973862997] [2021-05-02 20:42:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:42:47,562 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:42:47,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10971944] [2021-05-02 20:42:47,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:42:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:42:47,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:42:47,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:42:47,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:47,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:47,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:47,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:47,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:47,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:47,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:47,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:42:47,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:42:47,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973862997] [2021-05-02 20:42:47,672 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:42:47,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10971944] [2021-05-02 20:42:47,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10971944] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:42:47,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:42:47,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:42:47,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163433658] [2021-05-02 20:42:47,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:42:47,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:42:47,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:42:47,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:42:47,673 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:42:47,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:42:47,693 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-05-02 20:42:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:42:47,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-05-02 20:42:47,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:42:47,695 INFO L225 Difference]: With dead ends: 81 [2021-05-02 20:42:47,695 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 20:42:47,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:42:47,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 20:42:47,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-05-02 20:42:47,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 60 states have internal predecessors, (68), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:42:47,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-05-02 20:42:47,707 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 41 [2021-05-02 20:42:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:42:47,707 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-05-02 20:42:47,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:42:47,707 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-05-02 20:42:47,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:42:47,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:42:47,708 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:42:47,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:42:47,917 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:42:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:42:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1755535540, now seen corresponding path program 2 times [2021-05-02 20:42:47,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:42:47,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184841581] [2021-05-02 20:42:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:42:47,923 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:42:47,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025312153] [2021-05-02 20:42:47,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:42:48,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:42:48,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:42:48,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:42:48,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:42:48,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:48,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:48,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:48,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:48,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:48,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:00,931 WARN L205 SmtUtils]: Spent 10.79 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:43:00,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:00,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:00,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:00,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:00,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:00,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:00,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:00,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:00,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:00,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:00,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:00,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:00,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,355 WARN L205 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 20:43:03,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:03,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,296 WARN L205 SmtUtils]: Spent 3.49 s on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 20:43:10,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,524 WARN L205 SmtUtils]: Spent 2.32 s on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 20:43:27,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:27,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 13 refuted. 3 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 20:43:30,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:43:30,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184841581] [2021-05-02 20:43:30,226 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:43:30,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025312153] [2021-05-02 20:43:30,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025312153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:43:30,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:43:30,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:43:30,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293889846] [2021-05-02 20:43:30,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:43:30,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:43:30,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:43:30,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=146, Unknown=8, NotChecked=0, Total=182 [2021-05-02 20:43:30,228 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:44:18,483 WARN L205 SmtUtils]: Spent 12.42 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 20:44:37,082 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 20:44:41,204 WARN L838 $PredicateComparison]: unable to prove that (and (< (+ (* c_main_~R~0 c_main_~R~0) 1) (+ c_main_~A~0 (* 2 c_main_~R~0))) (exists ((aux_div_v_main_~u~0_10_32 Int) (aux_div_aux_mod_v_main_~u~0_10_32_69 Int)) (let ((.cse0 (* 2 aux_div_aux_mod_v_main_~u~0_10_32_69)) (.cse2 (+ c_main_~A~0 c_main_~r~0)) (.cse3 (* 2 aux_div_v_main_~u~0_10_32)) (.cse1 (* aux_div_aux_mod_v_main_~u~0_10_32_69 aux_div_aux_mod_v_main_~u~0_10_32_69))) (and (<= (+ .cse0 .cse1 1) .cse2) (<= (+ .cse3 .cse1 1) .cse2) (= (+ (* c_main_~v~0 c_main_~v~0) (* 2 c_main_~A~0) (* 2 .cse1) (* 2 (* aux_div_aux_mod_v_main_~u~0_10_32_69 aux_div_aux_mod_v_main_~u~0_10_32_69 c_main_~r~0)) (* 2 c_main_~r~0) (* 2 (* aux_div_aux_mod_v_main_~u~0_10_32_69 aux_div_aux_mod_v_main_~u~0_10_32_69 c_main_~A~0))) (+ (* 2 c_main_~v~0) (* aux_div_aux_mod_v_main_~u~0_10_32_69 aux_div_aux_mod_v_main_~u~0_10_32_69 aux_div_aux_mod_v_main_~u~0_10_32_69 aux_div_aux_mod_v_main_~u~0_10_32_69) (* 2 (* c_main_~A~0 c_main_~r~0)) (* c_main_~r~0 c_main_~r~0) (* c_main_~A~0 c_main_~A~0))) (< (+ (* aux_div_v_main_~u~0_10_32 aux_div_v_main_~u~0_10_32) 1) (+ .cse3 c_main_~A~0)) (= (mod (+ c_main_~A~0 c_main_~r~0 (* (- 1) aux_div_aux_mod_v_main_~u~0_10_32_69 aux_div_aux_mod_v_main_~u~0_10_32_69) 1) 2) 0) (< .cse2 (+ .cse0 .cse1 3)) (< .cse2 (+ .cse3 .cse1 3))))) (= (+ (* c_main_~u~0 c_main_~u~0) (* 2 c_main_~v~0)) (+ (* c_main_~v~0 c_main_~v~0) (* 4 c_main_~A~0) (* 4 c_main_~r~0) (* 2 c_main_~u~0))) (= c_main_~v~0 1)) is different from false [2021-05-02 20:45:08,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:08,067 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2021-05-02 20:45:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:45:08,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 20:45:08,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:08,069 INFO L225 Difference]: With dead ends: 93 [2021-05-02 20:45:08,069 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 20:45:08,069 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 73498.0ms TimeCoverageRelationStatistics Valid=59, Invalid=312, Unknown=13, NotChecked=36, Total=420 [2021-05-02 20:45:08,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 20:45:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2021-05-02 20:45:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 64 states have internal predecessors, (71), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:45:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2021-05-02 20:45:08,072 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 41 [2021-05-02 20:45:08,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:08,072 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2021-05-02 20:45:08,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:45:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2021-05-02 20:45:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:45:08,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:08,072 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:08,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:08,273 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:08,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:08,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1916183630, now seen corresponding path program 2 times [2021-05-02 20:45:08,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:08,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439263513] [2021-05-02 20:45:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:08,279 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:08,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037132570] [2021-05-02 20:45:08,279 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 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 20:45:08,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:45:08,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:45:08,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:45:08,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:08,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 20:45:08,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:08,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439263513] [2021-05-02 20:45:08,663 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:08,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037132570] [2021-05-02 20:45:08,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037132570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:08,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:08,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:45:08,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743877006] [2021-05-02 20:45:08,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:45:08,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:08,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:45:08,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:45:08,664 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:45:14,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:14,990 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-05-02 20:45:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:45:14,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2021-05-02 20:45:14,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:14,991 INFO L225 Difference]: With dead ends: 89 [2021-05-02 20:45:14,991 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 20:45:14,992 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:45:14,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 20:45:14,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 20:45:14,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 64 states have internal predecessors, (70), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:45:14,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-05-02 20:45:14,994 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 47 [2021-05-02 20:45:14,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:14,994 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-05-02 20:45:14,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:45:14,995 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-05-02 20:45:14,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:45:14,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:14,995 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:15,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:45:15,202 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:15,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:15,202 INFO L82 PathProgramCache]: Analyzing trace with hash 489214531, now seen corresponding path program 3 times [2021-05-02 20:45:15,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:15,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197021364] [2021-05-02 20:45:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:15,212 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:15,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86469945] [2021-05-02 20:45:15,212 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