/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/divbin2_valuebound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:07:59,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:07:59,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:07:59,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:07:59,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:07:59,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:07:59,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:07:59,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:07:59,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:07:59,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:07:59,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:07:59,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:07:59,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:07:59,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:07:59,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:07:59,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:07:59,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:07:59,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:07:59,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:07:59,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:07:59,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:07:59,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:07:59,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:07:59,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:07:59,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:07:59,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:07:59,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:07:59,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:07:59,788 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:07:59,795 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:07:59,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:07:59,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:07:59,796 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:07:59,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:07:59,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:07:59,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:07:59,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:07:59,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:07:59,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:07:59,797 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:07:59,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:07:59,798 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:07:59,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:07:59,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:07:59,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:07:59,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:07:59,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:07:59,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:07:59,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:07:59,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:07:59,799 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:07:59,799 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:08:00,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:08:00,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:08:00,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:08:00,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:08:00,052 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:08:00,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound50.i [2021-05-02 20:08:00,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed6ed6717/b0848936b029428589e8fd4e4d7c83fd/FLAGd813a3e29 [2021-05-02 20:08:00,444 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:08:00,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound50.i [2021-05-02 20:08:00,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed6ed6717/b0848936b029428589e8fd4e4d7c83fd/FLAGd813a3e29 [2021-05-02 20:08:00,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed6ed6717/b0848936b029428589e8fd4e4d7c83fd [2021-05-02 20:08:00,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:08:00,466 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:08:00,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:08:00,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:08:00,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:08:00,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:08:00" (1/1) ... [2021-05-02 20:08:00,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cd71264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:08:00, skipping insertion in model container [2021-05-02 20:08:00,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:08:00" (1/1) ... [2021-05-02 20:08:00,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:08:00,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:08:00,623 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound50.i[959,972] [2021-05-02 20:08:00,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:08:00,642 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:08:00,653 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound50.i[959,972] [2021-05-02 20:08:00,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:08:00,675 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:08:00,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:08:00 WrapperNode [2021-05-02 20:08:00,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:08:00,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:08:00,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:08:00,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:08:00,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:08:00" (1/1) ... [2021-05-02 20:08:00,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:08:00" (1/1) ... [2021-05-02 20:08:00,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:08:00" (1/1) ... [2021-05-02 20:08:00,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:08:00" (1/1) ... [2021-05-02 20:08:00,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:08:00" (1/1) ... [2021-05-02 20:08:00,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:08:00" (1/1) ... [2021-05-02 20:08:00,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:08:00" (1/1) ... [2021-05-02 20:08:00,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:08:00,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:08:00,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:08:00,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:08:00,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:08:00" (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 20:08:00,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:08:00,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:08:00,797 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:08:00,797 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:08:00,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:08:00,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:08:00,798 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:08:00,798 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:08:00,798 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 20:08:00,798 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 20:08:00,798 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:08:00,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:08:00,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:08:00,799 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:08:00,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:08:00,799 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:08:00,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:08:00,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:08:00,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:08:00,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:08:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:08:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:08:01,047 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:08:01,047 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:08:01,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:08:01 BoogieIcfgContainer [2021-05-02 20:08:01,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:08:01,049 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:08:01,049 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:08:01,050 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:08:01,051 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:08:01" (1/1) ... [2021-05-02 20:08:01,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:08:01 BasicIcfg [2021-05-02 20:08:01,062 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:08:01,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:08:01,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:08:01,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:08:01,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:08:00" (1/4) ... [2021-05-02 20:08:01,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3f862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:08:01, skipping insertion in model container [2021-05-02 20:08:01,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:08:00" (2/4) ... [2021-05-02 20:08:01,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3f862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:08:01, skipping insertion in model container [2021-05-02 20:08:01,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:08:01" (3/4) ... [2021-05-02 20:08:01,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3f862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:08:01, skipping insertion in model container [2021-05-02 20:08:01,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:08:01" (4/4) ... [2021-05-02 20:08:01,067 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound50.iJordan [2021-05-02 20:08:01,070 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:08:01,072 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:08:01,099 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:08:01,121 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:08:01,122 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:08:01,122 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:08:01,122 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:08:01,122 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:08:01,122 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:08:01,122 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:08:01,122 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:08:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:08:01,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:08:01,135 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:08:01,135 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:08:01,135 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:08:01,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:08:01,139 INFO L82 PathProgramCache]: Analyzing trace with hash 483266332, now seen corresponding path program 1 times [2021-05-02 20:08:01,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:08:01,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588518487] [2021-05-02 20:08:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:08:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:08:01,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:08:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:08:01,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:08:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:08:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:08:01,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:08:01,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588518487] [2021-05-02 20:08:01,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588518487] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:08:01,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:08:01,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:08:01,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098721103] [2021-05-02 20:08:01,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:08:01,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:08:01,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:08:01,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:08:01,353 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:08:01,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:08:01,391 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 20:08:01,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:08:01,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:08:01,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:08:01,397 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:08:01,397 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:08:01,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:08:01,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:08:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:08:01,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:08:01,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 20:08:01,419 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-05-02 20:08:01,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:08:01,419 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 20:08:01,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:08:01,419 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 20:08:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 20:08:01,420 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:08:01,420 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:08:01,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:08:01,420 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:08:01,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:08:01,421 INFO L82 PathProgramCache]: Analyzing trace with hash -2138426952, now seen corresponding path program 1 times [2021-05-02 20:08:01,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:08:01,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616814574] [2021-05-02 20:08:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:08:01,432 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:08:01,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64722198] [2021-05-02 20:08:01,432 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 20:08:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:08:01,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:08:01,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:08:01,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:01,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:08:01,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:08:01,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616814574] [2021-05-02 20:08:01,680 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:08:01,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64722198] [2021-05-02 20:08:01,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64722198] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:08:01,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:08:01,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:08:01,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650604336] [2021-05-02 20:08:01,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:08:01,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:08:01,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:08:01,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:08:01,682 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:08:01,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:08:01,765 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 20:08:01,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:08:01,765 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-05-02 20:08:01,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:08:01,766 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:08:01,766 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:08:01,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:08:01,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:08:01,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:08:01,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:08:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-02 20:08:01,771 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2021-05-02 20:08:01,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:08:01,771 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-02 20:08:01,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:08:01,771 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-02 20:08:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 20:08:01,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:08:01,772 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:08:01,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:08:01,988 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:08:01,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:08:01,991 INFO L82 PathProgramCache]: Analyzing trace with hash -554838191, now seen corresponding path program 1 times [2021-05-02 20:08:01,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:08:01,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177746676] [2021-05-02 20:08:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:08:02,016 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:08:02,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059237272] [2021-05-02 20:08:02,017 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 20:08:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:08:02,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:08:02,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:08:02,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:02,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:08:02,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:08:02,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177746676] [2021-05-02 20:08:02,206 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:08:02,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059237272] [2021-05-02 20:08:02,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059237272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:08:02,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:08:02,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:08:02,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536724760] [2021-05-02 20:08:02,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:08:02,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:08:02,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:08:02,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:08:02,209 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:08:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:08:02,303 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-02 20:08:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:08:02,304 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-05-02 20:08:02,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:08:02,305 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:08:02,305 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:08:02,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:08:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:08:02,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 20:08:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:08:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-02 20:08:02,308 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-05-02 20:08:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:08:02,309 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-02 20:08:02,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:08:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-02 20:08:02,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 20:08:02,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:08:02,309 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:08:02,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:08:02,525 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:08:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:08:02,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1600606598, now seen corresponding path program 1 times [2021-05-02 20:08:02,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:08:02,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777219562] [2021-05-02 20:08:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:08:02,533 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:08:02,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689837533] [2021-05-02 20:08:02,533 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 20:08:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:08:02,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:08:02,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:08:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:08:02,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:08:02,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777219562] [2021-05-02 20:08:02,638 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:08:02,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689837533] [2021-05-02 20:08:02,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689837533] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:08:02,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:08:02,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:08:02,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555652290] [2021-05-02 20:08:02,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:08:02,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:08:02,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:08:02,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:08:02,639 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:08:02,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:08:02,650 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-02 20:08:02,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:08:02,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 20:08:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:08:02,651 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:08:02,651 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:08:02,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:08:02,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:08:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:08:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:08:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 20:08:02,654 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2021-05-02 20:08:02,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:08:02,654 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 20:08:02,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:08:02,654 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 20:08:02,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:08:02,655 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:08:02,655 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 20:08:02,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:08:02,869 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:08:02,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:08:02,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1664896543, now seen corresponding path program 1 times [2021-05-02 20:08:02,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:08:02,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352054355] [2021-05-02 20:08:02,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:08:02,876 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:08:02,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911221657] [2021-05-02 20:08:02,877 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 20:08:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:08:02,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 20:08:02,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:08:03,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:03,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:03,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:03,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:08:03,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:08:03,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352054355] [2021-05-02 20:08:03,114 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:08:03,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911221657] [2021-05-02 20:08:03,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911221657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:08:03,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:08:03,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:08:03,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876963471] [2021-05-02 20:08:03,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:08:03,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:08:03,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:08:03,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:08:03,117 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:08:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:08:03,243 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-05-02 20:08:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:08:03,244 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:08:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:08:03,245 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:08:03,245 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 20:08:03,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:08:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 20:08:03,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 20:08:03,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:08:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 20:08:03,252 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 29 [2021-05-02 20:08:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:08:03,253 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 20:08:03,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:08:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 20:08:03,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 20:08:03,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:08:03,254 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:08:03,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:08:03,461 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:08:03,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:08:03,462 INFO L82 PathProgramCache]: Analyzing trace with hash -976975752, now seen corresponding path program 2 times [2021-05-02 20:08:03,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:08:03,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875397896] [2021-05-02 20:08:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:08:03,481 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:08:03,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909437815] [2021-05-02 20:08:03,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:08:03,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:08:03,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:08:03,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:08:03,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:08:03,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:03,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:03,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:03,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:03,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:03,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:08:03,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:08:03,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875397896] [2021-05-02 20:08:03,727 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:08:03,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909437815] [2021-05-02 20:08:03,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909437815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:08:03,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:08:03,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:08:03,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006620239] [2021-05-02 20:08:03,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:08:03,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:08:03,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:08:03,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:08:03,729 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:08:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:08:03,933 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2021-05-02 20:08:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:08:03,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-02 20:08:03,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:08:03,937 INFO L225 Difference]: With dead ends: 83 [2021-05-02 20:08:03,937 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 20:08:03,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:08:03,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 20:08:03,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2021-05-02 20:08:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:08:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 20:08:03,950 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 31 [2021-05-02 20:08:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:08:03,951 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 20:08:03,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:08:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 20:08:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:08:03,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:08:03,952 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:08:04,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:08:04,169 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:08:04,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:08:04,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1490579311, now seen corresponding path program 3 times [2021-05-02 20:08:04,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:08:04,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226615555] [2021-05-02 20:08:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:08:04,178 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:08:04,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043912789] [2021-05-02 20:08:04,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:08:04,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:08:04,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:08:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 20:08:04,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:08:04,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:08:04,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:08:04,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226615555] [2021-05-02 20:08:04,419 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:08:04,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043912789] [2021-05-02 20:08:04,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043912789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:08:04,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:08:04,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:08:04,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151610632] [2021-05-02 20:08:04,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:08:04,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:08:04,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:08:04,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:08:04,420 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:08:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:08:04,528 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-05-02 20:08:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:08:04,528 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2021-05-02 20:08:04,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:08:04,529 INFO L225 Difference]: With dead ends: 62 [2021-05-02 20:08:04,529 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 20:08:04,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:08:04,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 20:08:04,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-05-02 20:08:04,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:08:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-05-02 20:08:04,531 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2021-05-02 20:08:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:08:04,531 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-05-02 20:08:04,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:08:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-05-02 20:08:04,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:08:04,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:08:04,532 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:08:04,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:08:04,737 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:08:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:08:04,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1815734547, now seen corresponding path program 4 times [2021-05-02 20:08:04,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:08:04,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701883534] [2021-05-02 20:08:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:08:04,744 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:08:04,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085050195] [2021-05-02 20:08:04,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:08:04,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:08:04,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:08:04,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:08:04,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:08:04,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:04,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:08:05,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:08:05,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701883534] [2021-05-02 20:08:05,072 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:08:05,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085050195] [2021-05-02 20:08:05,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085050195] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:08:05,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:08:05,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:08:05,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690006343] [2021-05-02 20:08:05,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:08:05,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:08:05,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:08:05,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:08:05,074 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:08:05,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:08:05,175 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-05-02 20:08:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:08:05,175 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2021-05-02 20:08:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:08:05,176 INFO L225 Difference]: With dead ends: 51 [2021-05-02 20:08:05,176 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:08:05,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:08:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:08:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 20:08:05,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:08:05,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-05-02 20:08:05,180 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2021-05-02 20:08:05,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:08:05,181 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-05-02 20:08:05,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:08:05,181 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-05-02 20:08:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:08:05,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:08:05,183 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:08:05,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:08:05,385 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:08:05,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:08:05,385 INFO L82 PathProgramCache]: Analyzing trace with hash -79763386, now seen corresponding path program 5 times [2021-05-02 20:08:05,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:08:05,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118894655] [2021-05-02 20:08:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:08:05,392 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:08:05,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602844730] [2021-05-02 20:08:05,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:08:05,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-02 20:08:05,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:08:05,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 20:08:05,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:08:05,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:05,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:05,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:05,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:05,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:05,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:08:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:08:05,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:08:05,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118894655] [2021-05-02 20:08:05,983 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:08:05,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602844730] [2021-05-02 20:08:05,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602844730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:08:05,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:08:05,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:08:05,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438204835] [2021-05-02 20:08:05,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:08:05,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:08:05,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:08:05,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:08:05,985 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:08:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:08:06,252 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2021-05-02 20:08:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:08:06,252 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2021-05-02 20:08:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:08:06,254 INFO L225 Difference]: With dead ends: 81 [2021-05-02 20:08:06,254 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 20:08:06,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 280.3ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:08:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 20:08:06,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2021-05-02 20:08:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:08:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-05-02 20:08:06,257 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 39 [2021-05-02 20:08:06,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:08:06,257 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-05-02 20:08:06,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:08:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-05-02 20:08:06,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:08:06,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:08:06,258 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:08:06,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:08:06,466 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:08:06,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:08:06,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1741211487, now seen corresponding path program 6 times [2021-05-02 20:08:06,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:08:06,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004870829] [2021-05-02 20:08:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:08:06,476 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:08:06,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675723261] [2021-05-02 20:08:06,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true