/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/divbin_unwindbound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:56:57,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:56:57,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:56:57,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:56:57,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:56:57,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:56:57,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:56:57,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:56:57,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:56:57,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:56:57,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:56:57,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:56:57,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:56:57,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:56:57,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:56:57,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:56:57,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:56:57,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:56:57,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:56:57,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:56:57,385 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:56:57,399 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:56:57,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:56:57,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:56:57,403 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:56:57,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:56:57,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:56:57,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:56:57,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:56:57,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:56:57,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:56:57,404 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:56:57,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:56:57,404 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:56:57,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:56:57,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:56:57,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:56:57,405 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:56:57,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:56:57,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:56:57,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:56:57,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:56:57,406 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:56:57,406 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:56:57,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:56:57,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:56:57,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:56:57,736 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:56:57,736 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:56:57,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound20.i [2021-05-06 07:56:57,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb89c7b9/baea42d9a4174e21b8d35da7dafd08fe/FLAG37feff2f6 [2021-05-06 07:56:58,136 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:56:58,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound20.i [2021-05-06 07:56:58,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb89c7b9/baea42d9a4174e21b8d35da7dafd08fe/FLAG37feff2f6 [2021-05-06 07:56:58,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb89c7b9/baea42d9a4174e21b8d35da7dafd08fe [2021-05-06 07:56:58,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:56:58,576 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:56:58,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:56:58,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:56:58,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:56:58,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:56:58" (1/1) ... [2021-05-06 07:56:58,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5078462d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:58, skipping insertion in model container [2021-05-06 07:56:58,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:56:58" (1/1) ... [2021-05-06 07:56:58,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:56:58,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:56:58,699 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/divbin_unwindbound20.i[958,971] [2021-05-06 07:56:58,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:56:58,714 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:56:58,766 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/divbin_unwindbound20.i[958,971] [2021-05-06 07:56:58,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:56:58,779 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:56:58,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:58 WrapperNode [2021-05-06 07:56:58,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:56:58,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:56:58,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:56:58,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:56:58,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:58" (1/1) ... [2021-05-06 07:56:58,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:58" (1/1) ... [2021-05-06 07:56:58,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:58" (1/1) ... [2021-05-06 07:56:58,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:58" (1/1) ... [2021-05-06 07:56:58,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:58" (1/1) ... [2021-05-06 07:56:58,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:58" (1/1) ... [2021-05-06 07:56:58,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:58" (1/1) ... [2021-05-06 07:56:58,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:56:58,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:56:58,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:56:58,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:56:58,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:56:58,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:56:58,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:56:58,934 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:56:58,934 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:56:58,934 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:56:58,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:56:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:56:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:56:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 07:56:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 07:56:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:56:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:56:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:56:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:56:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:56:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:56:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:56:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:56:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:56:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:56:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:56:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:56:59,127 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:56:59,128 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:56:59,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:56:59 BoogieIcfgContainer [2021-05-06 07:56:59,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:56:59,129 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:56:59,129 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:56:59,130 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:56:59,132 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:56:59" (1/1) ... [2021-05-06 07:56:59,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:56:59 BasicIcfg [2021-05-06 07:56:59,142 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:56:59,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:56:59,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:56:59,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:56:59,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:56:58" (1/4) ... [2021-05-06 07:56:59,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b0e740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:56:59, skipping insertion in model container [2021-05-06 07:56:59,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:58" (2/4) ... [2021-05-06 07:56:59,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b0e740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:56:59, skipping insertion in model container [2021-05-06 07:56:59,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:56:59" (3/4) ... [2021-05-06 07:56:59,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b0e740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:56:59, skipping insertion in model container [2021-05-06 07:56:59,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:56:59" (4/4) ... [2021-05-06 07:56:59,147 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound20.iJordan [2021-05-06 07:56:59,150 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:56:59,153 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:56:59,164 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:56:59,176 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:56:59,176 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:56:59,177 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:56:59,177 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:56:59,177 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:56:59,177 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:56:59,177 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:56:59,177 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:56:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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) [2021-05-06 07:56:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:56:59,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:56:59,191 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] [2021-05-06 07:56:59,191 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:56:59,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:56:59,194 INFO L82 PathProgramCache]: Analyzing trace with hash 35225450, now seen corresponding path program 1 times [2021-05-06 07:56:59,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:56:59,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778089670] [2021-05-06 07:56:59,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:56:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:59,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:56:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:59,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:56:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:59,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 07:56:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:56:59,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:56:59,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778089670] [2021-05-06 07:56:59,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778089670] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:56:59,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:56:59,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:56:59,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400182247] [2021-05-06 07:56:59,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:56:59,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:56:59,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:56:59,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:56:59,376 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:56:59,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:56:59,435 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 07:56:59,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:56:59,436 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, (5), 3 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 [2021-05-06 07:56:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:56:59,441 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:56:59,441 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 07:56:59,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:56:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 07:56:59,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-06 07:56:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2021-05-06 07:56:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-05-06 07:56:59,463 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2021-05-06 07:56:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:56:59,464 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-05-06 07:56:59,464 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:56:59,464 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-05-06 07:56:59,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 07:56:59,465 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:56:59,465 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] [2021-05-06 07:56:59,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:56:59,466 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:56:59,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:56:59,466 INFO L82 PathProgramCache]: Analyzing trace with hash 106385839, now seen corresponding path program 1 times [2021-05-06 07:56:59,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:56:59,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61985612] [2021-05-06 07:56:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:56:59,481 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:56:59,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020298928] [2021-05-06 07:56:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:56:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:59,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:56:59,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:56:59,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:59,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:59,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:59,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:59,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:56:59,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:56:59,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61985612] [2021-05-06 07:56:59,725 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:56:59,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020298928] [2021-05-06 07:56:59,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020298928] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:56:59,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:56:59,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:56:59,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123369457] [2021-05-06 07:56:59,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 07:56:59,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:56:59,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 07:56:59,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:56:59,728 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-05-06 07:56:59,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:56:59,739 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-05-06 07:56:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 07:56:59,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 25 [2021-05-06 07:56:59,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:56:59,744 INFO L225 Difference]: With dead ends: 30 [2021-05-06 07:56:59,744 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 07:56:59,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:56:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 07:56:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 07:56:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 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) [2021-05-06 07:56:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-05-06 07:56:59,752 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2021-05-06 07:56:59,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:56:59,757 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-05-06 07:56:59,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-05-06 07:56:59,758 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-05-06 07:56:59,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 07:56:59,758 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:56:59,758 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] [2021-05-06 07:56:59,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:56:59,976 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:56:59,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:56:59,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1662084126, now seen corresponding path program 1 times [2021-05-06 07:56:59,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:56:59,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029746529] [2021-05-06 07:56:59,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:56:59,992 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:56:59,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737328437] [2021-05-06 07:56:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:00,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:57:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:00,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:00,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:00,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:00,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:00,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:00,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:00,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:00,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:57:00,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:00,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029746529] [2021-05-06 07:57:00,123 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:00,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737328437] [2021-05-06 07:57:00,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737328437] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:57:00,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:57:00,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:57:00,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779945609] [2021-05-06 07:57:00,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:57:00,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:00,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:57:00,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:57:00,126 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-05-06 07:57:00,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:00,154 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-05-06 07:57:00,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:57:00,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 26 [2021-05-06 07:57:00,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:00,155 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:57:00,155 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:57:00,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:57:00,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:57:00,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-06 07:57:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2021-05-06 07:57:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-05-06 07:57:00,161 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2021-05-06 07:57:00,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:00,162 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-05-06 07:57:00,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-05-06 07:57:00,162 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-05-06 07:57:00,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 07:57:00,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:00,163 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] [2021-05-06 07:57:00,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:00,381 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:00,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1663216184, now seen corresponding path program 1 times [2021-05-06 07:57:00,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:00,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092504409] [2021-05-06 07:57:00,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:00,394 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:00,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510652720] [2021-05-06 07:57:00,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:00,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:57:00,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:00,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:00,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:00,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:00,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:00,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:57:00,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:00,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092504409] [2021-05-06 07:57:00,690 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:00,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510652720] [2021-05-06 07:57:00,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510652720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:57:00,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:57:00,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:57:00,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777747139] [2021-05-06 07:57:00,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:57:00,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:00,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:57:00,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:57:00,693 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-05-06 07:57:00,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:00,891 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-05-06 07:57:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:57:00,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 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 26 [2021-05-06 07:57:00,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:00,892 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:57:00,893 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 07:57:00,893 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:57:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 07:57:00,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-06 07:57:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:57:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-05-06 07:57:00,896 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 26 [2021-05-06 07:57:00,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:00,896 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-05-06 07:57:00,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-05-06 07:57:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-05-06 07:57:00,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:57:00,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:00,897 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] [2021-05-06 07:57:01,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:01,098 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:01,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:01,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1664227005, now seen corresponding path program 1 times [2021-05-06 07:57:01,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:01,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621931243] [2021-05-06 07:57:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:01,109 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:01,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095410222] [2021-05-06 07:57:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:01,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:57:01,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:01,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:57:01,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:01,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621931243] [2021-05-06 07:57:01,217 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:01,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095410222] [2021-05-06 07:57:01,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095410222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:57:01,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:57:01,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 07:57:01,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944528682] [2021-05-06 07:57:01,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:57:01,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:01,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:57:01,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:57:01,219 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-05-06 07:57:01,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:01,239 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-06 07:57:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:57:01,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 28 [2021-05-06 07:57:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:01,240 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:57:01,240 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 07:57:01,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:57:01,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 07:57:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-06 07:57:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:57:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 07:57:01,243 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 28 [2021-05-06 07:57:01,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:01,243 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 07:57:01,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-05-06 07:57:01,243 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 07:57:01,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 07:57:01,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:01,244 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] [2021-05-06 07:57:01,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:01,461 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:01,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1687306486, now seen corresponding path program 1 times [2021-05-06 07:57:01,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:01,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259942359] [2021-05-06 07:57:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:01,471 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:01,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997045380] [2021-05-06 07:57:01,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:01,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:57:01,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:01,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:57:01,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:01,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259942359] [2021-05-06 07:57:01,581 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:01,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997045380] [2021-05-06 07:57:01,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997045380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:57:01,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:57:01,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:57:01,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141750721] [2021-05-06 07:57:01,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:57:01,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:01,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:57:01,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:57:01,582 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-05-06 07:57:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:01,608 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-06 07:57:01,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:57:01,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 29 [2021-05-06 07:57:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:01,609 INFO L225 Difference]: With dead ends: 57 [2021-05-06 07:57:01,610 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 07:57:01,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:57:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 07:57:01,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-05-06 07:57:01,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:57:01,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-06 07:57:01,613 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 29 [2021-05-06 07:57:01,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:01,613 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-06 07:57:01,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-05-06 07:57:01,613 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-06 07:57:01,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 07:57:01,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:01,614 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] [2021-05-06 07:57:01,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:57:01,832 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:01,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:01,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1686174428, now seen corresponding path program 1 times [2021-05-06 07:57:01,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:01,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906041837] [2021-05-06 07:57:01,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:01,841 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:01,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087810357] [2021-05-06 07:57:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:01,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 07:57:01,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:01,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:01,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:02,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:02,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:02,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:57:02,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:02,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906041837] [2021-05-06 07:57:02,052 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:02,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087810357] [2021-05-06 07:57:02,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087810357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:57:02,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:57:02,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:57:02,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755973631] [2021-05-06 07:57:02,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:57:02,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:02,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:57:02,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:57:02,053 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:57:04,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:04,376 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2021-05-06 07:57:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:57:04,376 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-05-06 07:57:04,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:04,377 INFO L225 Difference]: With dead ends: 71 [2021-05-06 07:57:04,377 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 07:57:04,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-06 07:57:04,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 07:57:04,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-06 07:57:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 07:57:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-05-06 07:57:04,381 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 29 [2021-05-06 07:57:04,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:04,381 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-05-06 07:57:04,381 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:57:04,381 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-05-06 07:57:04,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 07:57:04,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:04,382 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, 1, 1, 1] [2021-05-06 07:57:04,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:04,583 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:04,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1552566600, now seen corresponding path program 1 times [2021-05-06 07:57:04,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:04,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715492656] [2021-05-06 07:57:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:04,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:04,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57105131] [2021-05-06 07:57:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:04,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 07:57:04,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:57:04,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:04,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715492656] [2021-05-06 07:57:04,703 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:04,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57105131] [2021-05-06 07:57:04,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57105131] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:57:04,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:57:04,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:57:04,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406854072] [2021-05-06 07:57:04,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:57:04,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:04,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:57:04,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:57:04,704 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:57:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:04,716 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-05-06 07:57:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:57:04,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-05-06 07:57:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:04,717 INFO L225 Difference]: With dead ends: 49 [2021-05-06 07:57:04,717 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 07:57:04,718 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:57:04,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 07:57:04,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 07:57:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:57:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-05-06 07:57:04,720 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 35 [2021-05-06 07:57:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:04,720 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-05-06 07:57:04,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:57:04,721 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-05-06 07:57:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 07:57:04,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:04,721 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, 1, 1, 1, 1, 1, 1] [2021-05-06 07:57:04,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:04,939 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:04,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1290263155, now seen corresponding path program 1 times [2021-05-06 07:57:04,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:04,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428218619] [2021-05-06 07:57:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:04,947 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:04,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335675943] [2021-05-06 07:57:04,948 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 [2021-05-06 07:57:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:04,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:57:04,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:04,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:04,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:04,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:05,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:05,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:05,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:05,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:05,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:05,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:05,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:05,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:05,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:05,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:05,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:57:05,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:05,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428218619] [2021-05-06 07:57:05,060 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:05,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335675943] [2021-05-06 07:57:05,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335675943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:57:05,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:57:05,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:57:05,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723867393] [2021-05-06 07:57:05,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:57:05,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:05,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:57:05,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:57:05,061 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-05-06 07:57:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:05,097 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-05-06 07:57:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:57:05,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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 38 [2021-05-06 07:57:05,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:05,098 INFO L225 Difference]: With dead ends: 59 [2021-05-06 07:57:05,098 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 07:57:05,098 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:57:05,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 07:57:05,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-05-06 07:57:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:57:05,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-05-06 07:57:05,101 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 38 [2021-05-06 07:57:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:05,101 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-05-06 07:57:05,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-05-06 07:57:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-05-06 07:57:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 07:57:05,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:05,102 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:57:05,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 07:57:05,318 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:05,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1291395213, now seen corresponding path program 1 times [2021-05-06 07:57:05,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:05,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377648740] [2021-05-06 07:57:05,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:05,329 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:05,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369713758] [2021-05-06 07:57:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true